Add a UCP warning when changing roles of online users

[LSNN]

Currently, if you change the role of a user that's in game, it will not change it, but still confirm the role was changed. But it will return to it's previous role after a refresh.

 

Also, we do request a [ONLINE/OFFLINE] tab for each user. 

[Centauri]

Will be updated next ucp update.