"Blue" overlay bug when dragging-dropping .flatpakref files to the UI

[brotenet]

• [ x] I have read the README.md document
• [x ] I am using the latest version of Warehouse
• [ x] I am using the Flatpak package of Warehouse
• [ x] I have not found any other opened issues on the same topic

Describe the issue in detail

When dragging and dropping a .flatpakref onto the Warehouse window and the UI "blue" overlay comes up, it does not go away after dropping the .flatpakref file.
The package installation works OK. The installation progress is visible (since the overlay is semi-transparent), all UI controls work even with the overlay visible on top of them (including the window-close button) but the overlay stays there.
The application needs to be closed in order for the overlay to go away.

Suggestion: The "blue" overlay is not really needed. It could be removed altogether without causing any issues regarding usability because we already have a pop-up dialog showing right after a file is dropped on to the UI.

(please see attached video)

whs_bug-2024-11-22_08.19.45.mp4

If applicable, provide steps to reproduce the issue

This issue is apparent in Linux Mint (Cinnamon). To reproduce drag and drop a .flatpakref on to the Warehouse UI.

Run flatpak run io.github.flattool.Warehouse in a terminal and if applicable, show any output

No relevant output is shown in the terminal.

[heliguy4599]

Thanks for bringing this to my attention! This should be fixed in the next update