4x-dev: Inspector submenu persists even when focus is switched to another application
OS: Linux Mint 20.1, Arch.: x86_64, MuseScore version (64-bit): 4.0.0-1552514374, revision: 28863c6
Open the attached test file. Select the tempo mark. Select "Appearance" in the Inspector. Now change the focus to another open program window.
Expected result: Only the selected program window should be visible.
Actual result: The "Appearance" submenu overlays the other application window.