Unable to reopen a video window closed through the window manager

[pgervais]

To reproduce:

• Open Score, create a new project
• Add a Window device -> a video window open
• Close the video window using the window's titlebar button provided by the OS -> window closes, Window device stays
• Open the context menu for the Window device in the Device Explore panel, chose "show" -> a non-functional video window appears

Deleting the Window device and re-creating it gives a functional video window (provided the video window has been closed prior to deleting the device, see https://github.com/ossia/score/issues/1484)

The bug is reproducible on

• Linux Debian Bookworm (amd64), compiled from source at git tag v3.1.11 (commit https://github.com/ossia/score/commit/b738b6cc21dbfe733e4b1d7225eb84e4fc8c6787)
• Mac OS M2, pre-compiled DMG, version 3.1.11 downloaded from https://github.com/ossia/score/releases/tag/v3.1.11