Add scaling option to Yarns hud gauges

git-svn-id: svn://svn.icculus.org/fs2open@10272 387891d4-d844-0410-90c0-e4c51a9137d3
Tweak HUD so that retail gauge scale/no-scale can be set in a minimalistic hud gauges table

git-svn-id: svn://svn.icculus.org/fs2open@10273 387891d4-d844-0410-90c0-e4c51a9137d3