macosx: Improve autohide behaviour for main video view controls

This makes the main video view more usable by not having the controls disappear on you when you are still trying to use them, even though the mouse is still

With changes:

Screen_Recording_2023-02-26_at_15.28.12

Before:

Screen_Recording_2023-02-26_at_15.33.36

Signed-off-by: Claudio Cambra developer@claudiocambra.com