I have enabled "monitor active programs" to keep track of how long I use my programs. After some time, the list gets long. I then wanted to group the programs and their subwindows into categories to have a better overview. But it takes about ten seconds to move an item into a subcategory.

Reproducible: Always

Steps to Reproduce:
1. Enable "monitor active programs"
2. work with several programs that use subwindows/tabs etc.
3. after a while (when the list of monitored windows is long enough) group items into categories and subcategories
Actual Results:  
moving takes too much time

Expected Results:  
It should be way faster

The longer the list get, the more time it uses to move items.