added promote/demote feature allows you to demote and promote players in the gui.

i also moved things arround in the gui, and the owner button has been moved 1 down.

builder and dev buttons have also been added to get them to work your groups will need to be called "dev" & "builder"

i also tested on 1.12.2 so i am sure it works on all versions that skquery and skript can run on.

-removed /grant being able to grant other players, now only sets your own.

i am also planning on extending the gui with maybe a addon that allows you to give permissions.