Column name becomes "undefined" when dragging and dropping in the stage area and delete action is removing all columns added by dragging and dropping

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.3.10 DXP GA1, Master
• Component/s: App Builder
• Labels:
  • appbuilder_builder
  • appbuilder_edit
  • appbuilder_frontend
  • appbuilder_tableview
• Fix Priority: 4

Description**
Issue 1: Column name becomes "undefined" when dragging and dropping in the stage area;
Issue 2: Delete action is removing all columns added by dragging and dropping

Steps to Reproduce

1. Go to Control Panel > App Builder > Custom Objects > Add a Custom Object;
2. Add a Form View with some fields;
3. Add a Table View > add some columns by dragging and dropping in the stage area; Issue 1
4. Delete one of the columns from the Table View; Issue 2

Expected Result
Issue 1: Column name should not become "undefined" when dragging and dropping in the stage area;
Issue 2: Delete action is not removing all columns added by dragging and dropping 

Actual Result
Issue 1: Column name becomes "undefined" when dragging and dropping in the stage area;
Issue 2: Delete action is removing all columns added by dragging and dropping

Reproduced In
master: 0a37c30806e3be96b1433866e1a235e61684bf37