fix: make drop target for uploads functional across entire range

[harshul786]

Description of Change

This PR addresses the issue [#21439](#21439), where the drop target for uploads was inconsistent and did not cover the full range of the drop area.

Changes made:

• Added w-full and h-full classes to the drop component of the FileUpload drag-and-drop.
• Removed unnecessary padding that created non-functional areas within the drop target.

Use Case

The change ensures that the entire designated area for uploads functions correctly as a drop target, improving the user experience and fixing the reported bug.

[cathysarisky]

I'm sorry to report that this does not solve the problem. See details here: #21687

[9larsons]

Thanks for the submission. This seems to foul up the visual indicator that you're over the drop. We're working on a similar fix that's for more than just the migrations dropdown, so I'm going to close this out, but it should be resolved fairly soon.