set ballistic HUD gauge any time HUD is changed -- fixes Mantis #2962

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10158 387891d4-d844-0410-90c0-e4c51a9137d3
some things don't need to be re-inited every time you pause the game

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10159 387891d4-d844-0410-90c0-e4c51a9137d3