Can't mouse into corner of guest display when in full screen without capturing cursor

Currently, it's nearly impossible to use hot corners in a client:

https://user-images.githubusercontent.com/140617/145101338-514320cd-e85d-4781-b849-a756a33bf42e.mp4

It would be great if it was possible to get entirely rid of the macOS menu bar and dock in fullscreen mode. Hopefully, this would make it possible to use hot corners in a client.

I'm no Mac developer but e.g. `NSApplicationPresentationHideMenuBar` (as opposed to `NSApplicationPresentationAutoHideMenuBar`) sounds promising: https://developer.apple.com/documentation/appkit/nsapplicationpresentationoptions

Locate the macOS fullscreen implementation and inspect how its presentation options control the menu bar and Dock. Compare the current behavior with NSApplicationPresentationHideMenuBar and verify that fullscreen users can reach hot corners without capturing the cursor.

Written by the indexing model from the issue text.