@dangeruss you can create a plugin to achieve that functionality.
Thanks, can you give me some pointers? Like which functions I would call and what hooks I should implement?
Add special indication or don't show current category in tools window for topic movement.
You can move topic to the same category...
I'd say it hasn't been moved then.
Should probably not display it's own category though. I'll give you that. Would be nice if it included a text bar above for those with loads of categories. So type (for example) 'develop' and it displays the developers category.