[Grid] Incorrect target column field after column reordering

[mbechev]

Description

The clipboard event returns an incorrect target.colField after reordering the columns of the Grid.

Steps To Reproduce

1. Paste any value to the first 'Id' column cell. The target.colField will be 'Id'.
2. Reorder the 'Id' column with any other.
3. Paste any value to the first column cell.
4. The target.colField is again 'Id' which is inaccurate since the 'Id' is no longer the first column.

https://stackblitz.com/edit/angular-dwvxqc

Actual Behavior

The clipboard takes into account the initial order of the columns only. The colField doesn't correspond to the actual column field after reordering.

Expected Behavior

The colField must correspond to its real column field.

Temporary Workaround

Sort the columns by their updated orderIndex and find the correct target column field. Once having it, the function responsible for updating the records could be updated accordingly:

https://stackblitz.com/edit/angular-dwvxqc-155hpq?file=src%2Fapp%2Fapp.component.ts