Adds game speed option to match setup, adds in-game control for single player games, fixes #785.
Refactors some GUI utility functions.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@13340 3db68df2-c116-0410-a063-a993310a9797
git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@13341 3db68df2-c116-0410-a063-a993310a9797
Merge remote-tracking branch 'remotes/trunk'