Fix: Fixed crash that could occur when dragging in grouped grid layout

[hishitetsu]

Since it is difficult to directly fix the crash, scrolling is disabled while dragging as a workaround.

Resolved / Related Issues

• Were these changes approved in an issue or discussion with the project maintainers? In order to prevent extra work, feature requests and changes to the codebase must be approved before the pull request will be reviewed. This prevents extra work for the contributors and maintainers.
  Closes Bug: File drag and drop crash in Grid Layout #14484

Validation
How did you test these changes?

• Did you build the app and test your changes?
• Did you check for accessibility? You can use Accessibility Insights for this.
• Did you remove any strings from the en-us resource file?
  • Did you search the solution to see if the string is still being used?
• Did you implement any design changes to an existing feature?
  • Was this change approved?
• Are there any other steps that were used to validate these changes?
  1. Change the layout to Grid.
  2. Change the group option to other than None.
  3. Drag an item to the bottom of the window.
  4. No longer crashes.

[yaira2]

It's interesting that this doesn't affect Details but either way, this workaround looks good.