It would be nice to be able to rename a group rather than have to rename each map inside the group. Right now the best way seems to be to open the XML in Notepad and do a "find and replace."

Also, it would be nice to be able to CTRL-click and select more than one map at a time to mark it to a group and/or level. I'm trying to organize my "Unknown" maps into a special "Unknown" group at a specific level.

Also, it would be nice to be able to label the levels. Say, Level 0 - Basic Editing, Level 1 - Intermediate, Level 2 - Advanced, Level 3 - Unknown, etc. It would probably be best to keep a prefix like "1 -" or "Level 1 -" so the user can still understand how the filter works.

Makes it much easier to build the XML.