Comment # 6 on bug 1169218 from Art Zh

(In reply to Fabian Vogt from comment #5)
> There seem to be three bugs:
> 1. Removing a look and feel does not delete its dependenceis
> 2. It appears twice in the "Installed Only" view
> 3. Removing it does not immediately refresh the "Installed Only" view
> 
> I would assume that 1 is actually intentional, as those dependencies might
> still be used.
> 
> Can you confirm that the LnF disappears if you reopen System Settings?

No, I can't. 
Please see in attachments "Demo issue" and output form command "kpackagetool5
--list --type Plasma/Theme"

I caught the issue when I tried reinstall broken theme.