diff --git a/.flake8 b/.flake8
index 4ff8840..4b852ab 100644
--- a/.flake8
+++ b/.flake8
@@ -31,6 +31,7 @@
     E124, # closing bracket, irritating while writing QB code
     E131, # continuation line unaligned for hanging indent
     E123, # closing bracket does not match indentation of opening bracket's line
+    E101, # ensured by use of black
 
 max-line-length = 200
 exclude=.github/helper/semgrep_rules
diff --git a/.github/workflows/ui-tests.yml b/.github/workflows/ui-tests.yml
deleted file mode 100644
index ab6a53b..0000000
--- a/.github/workflows/ui-tests.yml
+++ /dev/null
@@ -1,117 +0,0 @@
-name: UI
-
-on:
-  pull_request:
-    paths-ignore:
-      - '**.md'
-  workflow_dispatch:
-
-concurrency:
-  group: ui-develop-${{ github.event.number }}
-  cancel-in-progress: true
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    timeout-minutes: 60
-
-    strategy:
-      fail-fast: false
-
-    name: UI Tests (Cypress)
-
-    services:
-      mysql:
-        image: mariadb:10.3
-        env:
-          MYSQL_ALLOW_EMPTY_PASSWORD: YES
-        ports:
-          - 3306:3306
-        options: --health-cmd="mysqladmin ping" --health-interval=5s --health-timeout=2s --health-retries=3
-
-    steps:
-      - name: Clone
-        uses: actions/checkout@v2
-
-      - name: Setup Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.8
-
-      - uses: actions/setup-node@v2
-        with:
-          node-version: 14
-          check-latest: true
-
-      - name: Add to Hosts
-        run: |
-          echo "127.0.0.1 test_site" | sudo tee -a /etc/hosts
-
-      - name: Cache pip
-        uses: actions/cache@v2
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
-          restore-keys: |
-            ${{ runner.os }}-pip-
-            ${{ runner.os }}-
-
-      - name: Cache node modules
-        uses: actions/cache@v2
-        env:
-          cache-name: cache-node-modules
-        with:
-          path: ~/.npm
-          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-build-${{ env.cache-name }}-
-            ${{ runner.os }}-build-
-            ${{ runner.os }}-
-
-      - name: Get yarn cache directory path
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-
-      - uses: actions/cache@v2
-        id: yarn-cache
-        with:
-          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-yarn-
-
-      - name: Cache cypress binary
-        uses: actions/cache@v2
-        with:
-          path: ~/.cache
-          key: ${{ runner.os }}-cypress-
-          restore-keys: |
-            ${{ runner.os }}-cypress-
-            ${{ runner.os }}-
-
-      - name: Install
-        run: bash ${GITHUB_WORKSPACE}/.github/helper/install.sh
-        env:
-          DB: mariadb
-          TYPE: ui
-
-      - name: Site Setup
-        run: cd ~/frappe-bench/ && bench --site test_site execute erpnext.setup.utils.before_tests
-
-      - name: cypress pre-requisites
-        run: cd ~/frappe-bench/apps/frappe && yarn add cypress-file-upload@^5 @testing-library/cypress@^8 --no-lockfile
-
-
-      - name: Build Assets
-        run: cd ~/frappe-bench/ && bench build
-        env:
-          CI: Yes
-
-      - name: UI Tests
-        run: cd ~/frappe-bench/ && bench --site test_site run-ui-tests erpnext --headless
-        env:
-          CYPRESS_RECORD_KEY: 60a8e3bf-08f5-45b1-9269-2b207d7d30cd
-
-      - name: Show bench console if tests failed
-        if: ${{ failure() }}
-        run: cat ~/frappe-bench/bench_run_logs.txt
diff --git a/erpnext/accounts/doctype/payment_order/payment_order.js b/erpnext/accounts/doctype/payment_order/payment_order.js
index 9074def..7d85d89 100644
--- a/erpnext/accounts/doctype/payment_order/payment_order.js
+++ b/erpnext/accounts/doctype/payment_order/payment_order.js
@@ -12,7 +12,6 @@
 		});
 
 		frm.set_df_property('references', 'cannot_add_rows', true);
-		frm.set_df_property('references', 'cannot_delete_rows', true);
 	},
 	refresh: function(frm) {
 		if (frm.doc.docstatus == 0) {
diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index bf29474..9b6cf46 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -1025,7 +1025,7 @@
 		query = query.format(
 			table="BOM Scrap Item",
 			where_conditions="",
-			select_columns=", bom_item.idx, item.description, is_process_loss",
+			select_columns=", item.description, is_process_loss",
 			is_stock_item=is_stock_item,
 			qty_field="stock_qty",
 		)
@@ -1038,7 +1038,7 @@
 			is_stock_item=is_stock_item,
 			qty_field="stock_qty" if fetch_qty_in_stock_uom else "qty",
 			select_columns=""", bom_item.uom, bom_item.conversion_factor, bom_item.source_warehouse,
-				bom_item.idx, bom_item.operation, bom_item.include_item_in_manufacturing, bom_item.sourced_by_supplier,
+				bom_item.operation, bom_item.include_item_in_manufacturing, bom_item.sourced_by_supplier,
 				bom_item.description, bom_item.base_rate as rate """,
 		)
 		items = frappe.db.sql(query, {"qty": qty, "bom": bom, "company": company}, as_dict=True)
diff --git a/erpnext/manufacturing/doctype/work_order/test_work_order.py b/erpnext/manufacturing/doctype/work_order/test_work_order.py
index 3721704..8934f9c 100644
--- a/erpnext/manufacturing/doctype/work_order/test_work_order.py
+++ b/erpnext/manufacturing/doctype/work_order/test_work_order.py
@@ -1114,6 +1114,36 @@
 		except frappe.MandatoryError:
 			self.fail("Batch generation causing failing in Work Order")
 
+	@change_settings(
+		"Manufacturing Settings",
+		{"backflush_raw_materials_based_on": "Material Transferred for Manufacture"},
+	)
+	def test_manufacture_entry_mapped_idx_with_exploded_bom(self):
+		"""Test if WO containing BOM with partial exploded items and scrap items, maps idx correctly."""
+		test_stock_entry.make_stock_entry(
+			item_code="_Test Item",
+			target="_Test Warehouse - _TC",
+			basic_rate=5000.0,
+			qty=2,
+		)
+		test_stock_entry.make_stock_entry(
+			item_code="_Test Item Home Desktop 100",
+			target="_Test Warehouse - _TC",
+			basic_rate=1000.0,
+			qty=2,
+		)
+
+		wo_order = make_wo_order_test_record(
+			qty=1,
+			use_multi_level_bom=1,
+			skip_transfer=1,
+		)
+
+		ste_manu = frappe.get_doc(make_stock_entry(wo_order.name, "Manufacture", 1))
+
+		for index, row in enumerate(ste_manu.get("items"), start=1):
+			self.assertEqual(index, row.idx)
+
 
 def update_job_card(job_card, jc_qty=None):
 	employee = frappe.db.get_value("Employee", {"status": "Active"}, "name")
diff --git a/erpnext/payroll/doctype/additional_salary/additional_salary.py b/erpnext/payroll/doctype/additional_salary/additional_salary.py
index 256a3b5..18bd3b7 100644
--- a/erpnext/payroll/doctype/additional_salary/additional_salary.py
+++ b/erpnext/payroll/doctype/additional_salary/additional_salary.py
@@ -147,6 +147,8 @@
 
 @frappe.whitelist()
 def get_additional_salaries(employee, start_date, end_date, component_type):
+	from frappe.query_builder import Criterion
+
 	comp_type = "Earning" if component_type == "earnings" else "Deduction"
 
 	additional_sal = frappe.qb.DocType("Additional Salary")
@@ -170,8 +172,23 @@
 			& (additional_sal.type == comp_type)
 		)
 		.where(
-			additional_sal.payroll_date[start_date:end_date]
-			| ((additional_sal.from_date <= end_date) & (additional_sal.to_date >= end_date))
+			Criterion.any(
+				[
+					Criterion.all(
+						[  # is recurring and additional salary dates fall within the payroll period
+							additional_sal.is_recurring == 1,
+							additional_sal.from_date <= end_date,
+							additional_sal.to_date >= end_date,
+						]
+					),
+					Criterion.all(
+						[  # is not recurring and additional salary's payroll date falls within the payroll period
+							additional_sal.is_recurring == 0,
+							additional_sal.payroll_date[start_date:end_date],
+						]
+					),
+				]
+			)
 		)
 		.run(as_dict=True)
 	)
diff --git a/erpnext/payroll/doctype/additional_salary/test_additional_salary.py b/erpnext/payroll/doctype/additional_salary/test_additional_salary.py
index 7d5d9e0..bd73936 100644
--- a/erpnext/payroll/doctype/additional_salary/test_additional_salary.py
+++ b/erpnext/payroll/doctype/additional_salary/test_additional_salary.py
@@ -4,7 +4,8 @@
 import unittest
 
 import frappe
-from frappe.utils import add_days, nowdate
+from frappe.tests.utils import FrappeTestCase
+from frappe.utils import add_days, add_months, nowdate
 
 import erpnext
 from erpnext.hr.doctype.employee.test_employee import make_employee
@@ -16,19 +17,10 @@
 from erpnext.payroll.doctype.salary_structure.test_salary_structure import make_salary_structure
 
 
-class TestAdditionalSalary(unittest.TestCase):
+class TestAdditionalSalary(FrappeTestCase):
 	def setUp(self):
 		setup_test()
 
-	def tearDown(self):
-		for dt in [
-			"Salary Slip",
-			"Additional Salary",
-			"Salary Structure Assignment",
-			"Salary Structure",
-		]:
-			frappe.db.sql("delete from `tab%s`" % dt)
-
 	def test_recurring_additional_salary(self):
 		amount = 0
 		salary_component = None
@@ -46,19 +38,66 @@
 			if earning.salary_component == "Recurring Salary Component":
 				amount = earning.amount
 				salary_component = earning.salary_component
+				break
 
 		self.assertEqual(amount, add_sal.amount)
 		self.assertEqual(salary_component, add_sal.salary_component)
 
+	def test_non_recurring_additional_salary(self):
+		amount = 0
+		salary_component = None
+		date = nowdate()
 
-def get_additional_salary(emp_id):
+		emp_id = make_employee("test_additional@salary.com")
+		frappe.db.set_value("Employee", emp_id, "relieving_date", add_days(date, 1800))
+		salary_structure = make_salary_structure(
+			"Test Salary Structure Additional Salary", "Monthly", employee=emp_id
+		)
+		add_sal = get_additional_salary(emp_id, recurring=False, payroll_date=date)
+
+		ss = make_employee_salary_slip(
+			"test_additional@salary.com", "Monthly", salary_structure=salary_structure.name
+		)
+
+		amount, salary_component = None, None
+		for earning in ss.earnings:
+			if earning.salary_component == "Recurring Salary Component":
+				amount = earning.amount
+				salary_component = earning.salary_component
+				break
+
+		self.assertEqual(amount, add_sal.amount)
+		self.assertEqual(salary_component, add_sal.salary_component)
+
+		# should not show up in next months
+		ss.posting_date = add_months(date, 1)
+		ss.start_date = ss.end_date = None
+		ss.earnings = []
+		ss.deductions = []
+		ss.save()
+
+		amount, salary_component = None, None
+		for earning in ss.earnings:
+			if earning.salary_component == "Recurring Salary Component":
+				amount = earning.amount
+				salary_component = earning.salary_component
+				break
+
+		self.assertIsNone(amount)
+		self.assertIsNone(salary_component)
+
+
+def get_additional_salary(emp_id, recurring=True, payroll_date=None):
 	create_salary_component("Recurring Salary Component")
 	add_sal = frappe.new_doc("Additional Salary")
 	add_sal.employee = emp_id
 	add_sal.salary_component = "Recurring Salary Component"
-	add_sal.is_recurring = 1
+
+	add_sal.is_recurring = 1 if recurring else 0
 	add_sal.from_date = add_days(nowdate(), -50)
 	add_sal.to_date = add_days(nowdate(), 180)
+	add_sal.payroll_date = payroll_date
+
 	add_sal.amount = 5000
 	add_sal.currency = erpnext.get_default_currency()
 	add_sal.save()
diff --git a/erpnext/stock/dashboard/item_dashboard.html b/erpnext/stock/dashboard/item_dashboard.html
index 99698ba..b7a786e 100644
--- a/erpnext/stock/dashboard/item_dashboard.html
+++ b/erpnext/stock/dashboard/item_dashboard.html
@@ -1,4 +1,4 @@
-<div>
+<div class="stock-levels">
 	<div class="result">
 	</div>
 	<div class="more hidden" style="padding: 15px;">
diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.py b/erpnext/stock/doctype/delivery_note/delivery_note.py
index 69e052b..0e68e85 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.py
@@ -280,8 +280,11 @@
 		)
 
 		if bypass_credit_limit_check_at_sales_order:
-			validate_against_credit_limit = True
-			extra_amount = self.base_grand_total
+			for d in self.get("items"):
+				if not d.against_sales_invoice:
+					validate_against_credit_limit = True
+					extra_amount = self.base_grand_total
+					break
 		else:
 			for d in self.get("items"):
 				if not (d.against_sales_order or d.against_sales_invoice):
diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index bc54f7f..1e62471 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -225,12 +225,16 @@
 	def set_transfer_qty(self):
 		for item in self.get("items"):
 			if not flt(item.qty):
-				frappe.throw(_("Row {0}: Qty is mandatory").format(item.idx))
+				frappe.throw(_("Row {0}: Qty is mandatory").format(item.idx), title=_("Zero quantity"))
 			if not flt(item.conversion_factor):
 				frappe.throw(_("Row {0}: UOM Conversion Factor is mandatory").format(item.idx))
 			item.transfer_qty = flt(
 				flt(item.qty) * flt(item.conversion_factor), self.precision("transfer_qty", item)
 			)
+			if not flt(item.transfer_qty):
+				frappe.throw(
+					_("Row {0}: Qty in Stock UOM can not be zero.").format(item.idx), title=_("Zero quantity")
+				)
 
 	def update_cost_in_project(self):
 		if self.work_order and not frappe.db.get_value(
@@ -1382,7 +1386,6 @@
 		if self.purpose != "Send to Subcontractor" and self.purpose in ["Manufacture", "Repack"]:
 			scrap_item_dict = self.get_bom_scrap_material(self.fg_completed_qty)
 			for item in scrap_item_dict.values():
-				item.idx = ""
 				if self.pro_doc and self.pro_doc.scrap_warehouse:
 					item["to_warehouse"] = self.pro_doc.scrap_warehouse
 
@@ -1898,7 +1901,6 @@
 			se_child.is_process_loss = item_row.get("is_process_loss", 0)
 
 			for field in [
-				"idx",
 				"po_detail",
 				"original_item",
 				"expense_account",
diff --git a/erpnext/stock/doctype/stock_entry/test_stock_entry.py b/erpnext/stock/doctype/stock_entry/test_stock_entry.py
index aeedcd1..3ccd342 100644
--- a/erpnext/stock/doctype/stock_entry/test_stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/test_stock_entry.py
@@ -51,7 +51,6 @@
 	def tearDown(self):
 		frappe.db.rollback()
 		frappe.set_user("Administrator")
-		frappe.db.set_value("Manufacturing Settings", None, "material_consumption", "0")
 
 	def test_fifo(self):
 		frappe.db.set_value("Stock Settings", None, "allow_negative_stock", 1)
@@ -767,13 +766,12 @@
 			fg_cost, flt(rm_cost + bom_operation_cost + work_order.additional_operating_cost, 2)
 		)
 
+	@change_settings("Manufacturing Settings", {"material_consumption": 1})
 	def test_work_order_manufacture_with_material_consumption(self):
 		from erpnext.manufacturing.doctype.work_order.work_order import (
 			make_stock_entry as _make_stock_entry,
 		)
 
-		frappe.db.set_value("Manufacturing Settings", None, "material_consumption", "1")
-
 		bom_no = frappe.db.get_value("BOM", {"item": "_Test FG Item", "is_default": 1, "docstatus": 1})
 
 		work_order = frappe.new_doc("Work Order")
@@ -983,43 +981,6 @@
 		repack.insert()
 		self.assertRaises(frappe.ValidationError, repack.submit)
 
-	# def test_material_consumption(self):
-	# 	frappe.db.set_value("Manufacturing Settings", None, "backflush_raw_materials_based_on", "BOM")
-	# 	frappe.db.set_value("Manufacturing Settings", None, "material_consumption", "0")
-
-	# 	from erpnext.manufacturing.doctype.work_order.work_order \
-	# 		import make_stock_entry as _make_stock_entry
-	# 	bom_no = frappe.db.get_value("BOM", {"item": "_Test FG Item 2",
-	# 		"is_default": 1, "docstatus": 1})
-
-	# 	work_order = frappe.new_doc("Work Order")
-	# 	work_order.update({
-	# 		"company": "_Test Company",
-	# 		"fg_warehouse": "_Test Warehouse 1 - _TC",
-	# 		"production_item": "_Test FG Item 2",
-	# 		"bom_no": bom_no,
-	# 		"qty": 4.0,
-	# 		"stock_uom": "_Test UOM",
-	# 		"wip_warehouse": "_Test Warehouse - _TC",
-	# 		"additional_operating_cost": 1000,
-	# 		"use_multi_level_bom": 1
-	# 	})
-	# 	work_order.insert()
-	# 	work_order.submit()
-
-	# 	make_stock_entry(item_code="_Test Serialized Item With Series", target="_Test Warehouse - _TC", qty=50, basic_rate=100)
-	# 	make_stock_entry(item_code="_Test Item 2", target="_Test Warehouse - _TC", qty=50, basic_rate=20)
-
-	# 	item_quantity = {
-	# 		'_Test Item': 2.0,
-	# 		'_Test Item 2': 12.0,
-	# 		'_Test Serialized Item With Series': 6.0
-	# 	}
-
-	# 	stock_entry = frappe.get_doc(_make_stock_entry(work_order.name, "Material Consumption for Manufacture", 2))
-	# 	for d in stock_entry.get('items'):
-	# 		self.assertEqual(item_quantity.get(d.item_code), d.qty)
-
 	def test_customer_provided_parts_se(self):
 		create_item(
 			"CUST-0987", is_customer_provided_item=1, customer="_Test Customer", is_purchase_item=0
@@ -1358,6 +1319,13 @@
 		issue.reload()  # reload because reposting current voucher updates rate
 		self.assertEqual(issue.value_difference, -30)
 
+	def test_transfer_qty_validation(self):
+		se = make_stock_entry(item_code="_Test Item", do_not_save=True, qty=0.001, rate=100)
+		se.items[0].uom = "Kg"
+		se.items[0].conversion_factor = 0.002
+
+		self.assertRaises(frappe.ValidationError, se.save)
+
 
 def make_serialized_item(**args):
 	args = frappe._dict(args)