* Enable fullscreen with hotkey & hotkey to toggle maximise in internal window
* Fix an obvious blunder
* Add fullscreen menu entry
* Change Alt+F11 to Shift+F11 (fix Windows bug)
* Move F5-F10 to Ctrl+F*, fullscreen by F11 and fix Linux bug
* Remove wrongly placed "fullscreen" attribute
* Remove temporary fixes for redundant bug
* Rename maximise to maximize
* Rename maximise to maximize
* Use fullscreen icon instead of maximise icon
* Actually include the icon in the commit
* Replace .svg icon with .png 16x16 icon
* Migrate editor hotkeys to Ctrl+1-7