PRessing F11 (full screen) should hide title bar

Before doing this, we should compare the behavior to other apps; what happens when you go into fullscreen and remove the titlebar. Is there some visual way to back out of this? Or is it on the user to press f11 again.

In chrome, there is a toast that apppears for seberal seconds that says to "press and hold ESC to exit". We cna have sopmething similar that says Press and Hold ESC to exit, if we can make sure we dont screw up the capturing of ESC. WOrst case, we dispaly "Press F11 to exit fullscreen"