I am trying to get the advanced theme switcher to list/drop down only pro sites premium themes available to that site.
Not, for themes that are enabled for the site via network admin.
Perhaps, for the widget settings, there could be a tick box for:
[TICK] Pro Sites Premium Themes
Why do I need this?
Because my demo site is also the Blog Template site.
Even though my demo site is Pro Site Max Level, as the advance theme switcher cannot see the premium themes, then I have to manually enable the themes via network manager.
Now, every new theme has all themes manually enabled due to the Blog Template. Which is bad, because new users can access Pro Site premium themes without being at the required level.