More work on admin UI
I had some issues with the standalone Welcome Page so I modified the Login Page to include this and moved the Admin-Check there as well.
I altered the Defines in ui_admin.c and updated on other positions where required so far (I'll adapt the remainder as time comes)
I enabled subfolders for the Music-UI (I don't see why this is a problem at all)
I the Ingame menu I completely disabled the HC-Butttons.
Added Logout-Ability for userlogion (adapted from adminlogin)

Signed-off-by: Harry Young <hendrik.gerritzen@googlemail.com>