[FR] Delete multiple empty tags at once from tag directory

[gi-man]

Is your feature request related to a problem? Please describe. This is a very low priority FR. I have some old tagged images that I'm in the process of transitioning to using hierarchical tags. When I add the images to the library it loads all the old tags into the tag directory. Deleting them is very slow since I have to right click each one and select delete tag then click delete to really delete them.

Describe the solution you'd like Options:

• Have a way to delete all tags not used (0) - Preferred option
• Allow selecting multiple tags at once to be deleted.
• Allow some keyboard option instead of mouse clicks

Alternatives I thought about editing the database but I'm not sure if it will update the xmp. I prefer not to mess with the db.

Additional context I dont want to develop carpal tunnel syndrome. :-)