Cancel button for Package's Unsaved Changes Pop up does not prevent the Inspector from closing if it was triggered by entering Play mode

Steps to reproduce:

1. Open the attached project
2. Open Package Manager window
3. Select "test1" package
4. Expand the Manage menu and select the Edit Manifest option
5. Delete the "1" from the technical name (Error prompt will pop up as there's an existing package with that name)
6. Enter Play mode
7. Observe the Unsaved Changes pop-up
8. Press Cancel 

Actual results: Changes are attempted to be saved. In case of invalid entries, the process fails, but if all changes are valid, they will be applied

Expected results: Cancel button prevents the Inspector from closing and applying/discarding pending changes

Reproducible with versions: 6000.3.12f1, 6000.4.3f1, 6000.5.0b5, 6000.3.0a3

Can’t test with versions: 6000.073f1 (Unsaved changes pop-up not present)

Tested on (OS): macOS 26.3.1

Notes:

• The Cancel button does work in other scenarios - Focusing the project window