fix: make changes that enable gantt view for job cards (#37661)

* fix: make changes that enable gantt view for job cards

* fix: add fields on listview and remove from json file

* fix: undo modified date

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Co-authored-by: Dietmar Fischer <fischer@kk-software.de>
diff --git a/erpnext/manufacturing/doctype/job_card/job_card_calendar.js b/erpnext/manufacturing/doctype/job_card/job_card_calendar.js
index f4877fd..9e32085 100644
--- a/erpnext/manufacturing/doctype/job_card/job_card_calendar.js
+++ b/erpnext/manufacturing/doctype/job_card/job_card_calendar.js
@@ -10,8 +10,8 @@
 	},
 	gantt: {
 		field_map: {
-			"start": "started_time",
-			"end": "started_time",
+			"start": "expected_start_date",
+			"end": "expected_end_date",
 			"id": "name",
 			"title": "subject",
 			"color": "color",
diff --git a/erpnext/manufacturing/doctype/job_card/job_card_list.js b/erpnext/manufacturing/doctype/job_card/job_card_list.js
index 5d883bf..99fca95 100644
--- a/erpnext/manufacturing/doctype/job_card/job_card_list.js
+++ b/erpnext/manufacturing/doctype/job_card/job_card_list.js
@@ -1,6 +1,6 @@
 frappe.listview_settings['Job Card'] = {
 	has_indicator_for_draft: true,
-
+	add_fields: ["expected_start_date", "expected_end_date"],
 	get_indicator: function(doc) {
 		const status_colors = {
 			"Work In Progress": "orange",