Created attachment 127503 [details]
Results of deleting a tag

In the Brush Presets docker, when selecting Tag > Delete this tag, the tag is deleted and disappears, but also tends to result in the next tag on the list showing as empty. Often after deleting a tag, other tags are cloned, showing up twice in the dropdown menu with one of them being normal and the other being empty.
After closing and rebooting Krita, the tags that had been deleted reappear as if they were not deleted in the first place. 


STEPS TO REPRODUCE
1. Brush presets docker > Tag > Delete this tag 

OBSERVED RESULT
Tag is deleted, but has unusual effects on other tags, and reappears when closing/reopening Krita.

EXPECTED RESULT
Tag is deleted permanently, without affecting other tags.

SOFTWARE/OS VERSIONS
Windows 10
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION