add alt+f1..f12 hotkeys

[rgl]

currently, only the alt+f4 hot key is available, but having other alt+fx keys are required, especially when running in linux, where you can use alt+f1, alt-f2, etc, to switch between virtual consoles, which are especially needed when installing oses. so, can you please add alt+f1..f12 hotkeys?

ps: oh, there are two sets of hotkeys, alt+fx (text console), and ctrl+alt+fx (graphical console), so we also need ctrl+alt+f1..f12 when running in graphical mode.