Fix window decorations not being uninstallable
BUG: 414570
FIXED-IN: 5.79
To try this out you can install the WhiteSur global theme, with this patch applied you should see the WhiteSur Aurorae
entry in the installed category of the window decorations.
IMHO it would feel even more hacky if we were to merge these two XML files together, that is why I have not done it. Consequently this patch does not fix already installed entries.