It'd be nice if the game automatically created a backup when the user overwrites a mission in 3den.
I've heard of people accidentally overwriting missions quite a bit over the years and have had it happen to myself.

Expected Behaviour/Idea:

1. User tells the game to overwrite a mission
2. Game creates "Backup" folder in the corresponding file (missions/mpmissions) if it doesnt exist already
3. Game copies mission over into the "Backup" folder (name being something like [missionname]_backup.[mapname] or [missionname].[mapname]_backup)
4. Game overwrites the original mission