chore: Linter and Sider fixes

- Translatable  strings cannot be multi line or be formatted by '+'
- Reduce no of tabs in stock_entry.js
diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.js b/erpnext/buying/doctype/purchase_order/purchase_order.js
index 3c6ebd6..2f52a9e 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.js
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.js
@@ -299,7 +299,7 @@
 			if(me.values) {
 				me.values.sub_con_rm_items.map((row,i) => {
 					if (!row.item_code || !row.rm_item_code || !row.warehouse || !row.qty || row.qty === 0) {
-						frappe.throw(__("Item Code, warehouse, quantity are required on row" + (i+1)));
+						frappe.throw(__("Item Code, warehouse, quantity are required on row {0}", [i+1]));
 					}
 				})
 				me._make_rm_stock_entry(me.dialog.fields_dict.sub_con_rm_items.grid.get_selected_children())
diff --git a/erpnext/stock/doctype/material_request/material_request.js b/erpnext/stock/doctype/material_request/material_request.js
index f004e91..01edd99 100644
--- a/erpnext/stock/doctype/material_request/material_request.js
+++ b/erpnext/stock/doctype/material_request/material_request.js
@@ -281,8 +281,7 @@
 				fieldname:'default_supplier',
 				fieldtype: 'Link',
 				options: 'Supplier',
-				description: __('Select a Supplier from the Default Suppliers of the items below. \
-					On selection, a Purchase Order will be made against items belonging to the selected Supplier only.'),
+				description: __('Select a Supplier from the Default Suppliers of the items below. On selection, a Purchase Order will be made against items belonging to the selected Supplier only.'),
 				get_query: () => {
 					return{
 						query: "erpnext.stock.doctype.material_request.material_request.get_default_supplier_query",
diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.js b/erpnext/stock/doctype/stock_entry/stock_entry.js
index 3292335..9121758 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.js
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.js
@@ -425,9 +425,9 @@
 	show_bom_custom_button: function(frm){
 		if (frm.doc.docstatus === 0 &&
 			['Material Issue', 'Material Receipt', 'Material Transfer', 'Send to Subcontractor'].includes(frm.doc.purpose)) {
-				frm.add_custom_button(__('Bill of Materials'), function() {
-					frm.events.get_items_from_bom(frm);
-				}, __("Get Items From"));
+			frm.add_custom_button(__('Bill of Materials'), function() {
+				frm.events.get_items_from_bom(frm);
+			}, __("Get Items From"));
 		}
 	},