Add keyboard shortcut for fullscreen

[debajit]

One of the more common operations that a normal user does with an image viewer is to make it fullscreen, but Viewior does not seem to provide one.

Could you add support for a simple keyboard shortcut like “f” to make Viewnior fullscreen?

[sjoblomj]

F11 should make Viewnior fullscreen; same key as most browsers and other applications.

[debajit]

Yes, that works. Closing the issue now, as this feature exists already.