service/hid: Update debug pad, xpad, stubbed and controller base to use ring lifo and the emulated controller

Refactor menu states and shortcuts in GMainWindow.

- Removed "Start", since it was always disabled unless it was "Continue"
which has now been moved to "Pause".
- Allow hotkeys to be used while in fullscreen.
- Removed the load amiibo hotkey.

configure_general: Allow framerate cap to be used in custom game configs