added option themes_single_collection_shortcut which reduces clicks for themes that only organize one collection (instead jumps right to the collection, while the >Select tool switches to >Expand to allow drilling down if a deeper level exists). Generally useful.

git-svn-id: http://svn.montala.net/svn/resourcespace@4887 c08608d7-6e46-0410-86ca-f2a6f1370df5