Making it impossible to remove a user from the Registered group, like elsewhere in the interface  ref: https://dev.tiki.org/Permission+inheritance
Making it impossible to remove a user from the Registered group, like elsewhere in the interface  ref: https://dev.tiki.org/Permission+inheritance

git-svn-id: af5bb48fb2a0cb60e67452268cc916e057dff245@43780 b456876b-0849-0410-b77d-98878d47e9d5

oregional/tiki,changi67/tiki,oregional/tiki,oregional/tiki,tikiorg/tiki,changi67/tiki,changi67/tiki,tikiorg/tiki,tikiorg/tiki,changi67/tiki,changi67/tiki,oregional/tiki,tikiorg/tiki