Fix for Issue #471

Added shadow to the labels on the key config page. My first commit let
me know if this is acceptable (Also first time using intelliJ and Git.
Fixed Issue #470

I am uncertain wether the key should be set on input settings screen.
The issue is fixed but I believe there are several key events which
shouldn't be handled in the DebugControlSystem class - This being one of
them. Then again I am not that familiar with the source. I just don't
believe removing the hud should be a debug thing.