allow tab configuration

git-svn-id: http://haxe.googlecode.com/svn/trunk@5904 f16182fa-f095-11de-8f43-4547254af6c6
minor

git-svn-id: http://haxe.googlecode.com/svn/trunk@5905 f16182fa-f095-11de-8f43-4547254af6c6