This fixes a bug with older Qt versions which would not remove the modal window from the parent in the setModal() call, resulting in an unusable parent window.
Fixes#368
In order to work around a bug in the OBS Studio UI code, we have to swap our modal status right before showing and right after hiding, so that the OBS Studio tray menu continuous working correctly. This is a bit of a weird solution, but it does work as expected.
Related: https://github.com/obsproject/obs-studio/issues/3518
Implements a manual and automatic update checker with support for both release and testing update channels, allowing users to stay as up to date as possible. It is fully compliant with privacy regulations around the world, as it stays completely silent and inactive until the user gives the Ok to connect to GitHub for the latest releases.
