Add "Fullscreen Windowed" display mode option #1180
Description
What problem is this solving
Title is self explanatory, it would be great to be able to watch demos in fullscreen windowed display mode atleast for fast alt-tabbing on non-native resolutions
Proposed solution
Maybe it is possible to change "Settings > Playback > Fullscreen" option by "Display mode" with three possible options (Fullscreen, Fullscreen Windowed, Windowed)?
Describe alternatives you've considered
No response