Gate RTSP Proton ctmod behind Advanced Mode

We do this for NorthStar Proton, probably makes sense
Helps declutter the dropdown too.

pupgui2/resources/ctmods/ctmod_rtspgeproton.py

@@ -8,7 +8,7 @@
 
 
 CT_NAME = 'RTSP Proton'
-CT_LAUNCHERS = ['steam']
+CT_LAUNCHERS = ['steam', 'advmode']
 CT_DESCRIPTION = {'en': QCoreApplication.instance().translate('ctmod_rtspgeproton', '''Fork of GE-Proton with enhanced Windows Media Foundation support.''')}