FS#6375 - Allow SPACE as a hotkey
I would like to remap the spacebar to something useful but this is currently not possible.
Attached is a rough patch that allows this.
Testing is minimal, so far I only tried remapping the [news]:quit hotkey to SPACE (RETURN) and map [maintoolbar]:pause to SPACE. This works, I can close the news windown with RETURN and pause the game with SPACE. However the game currently crashes when saving the `hotkeys.cfg` back to disk with "Assertion failed [..]/src/hotkeys.cpp: keycode < 128".
This task depends upon