991188-Primary Key column is missed in Drag and drop to custom control#4670

AishwaryaRameshbabu-SF3446 wants to merge 1 commit intohotfix/hotfix-v31.2.12syncfusion-content/ej2-asp-core-mvc-docs:hotfix/hotfix-v31.2.12from

991188-PrimaryHotfixsyncfusion-content/ej2-asp-core-mvc-docs:991188-PrimaryHotfixCopy head branch name to clipboard