Request: "Default" themes pinned to the top for event administrators/managers

[RaoOfPhysics]

This concerns the instance at CERN.

When a user is not signed in or is not the administrator of an event, they are presented with a limited set of "default" themes to skin the event:

However, when you log in as an administrator or manager, you see a much longer list:

Is it possible to show this second list with the "default" themes from the first list pinned to the top and clearly separated (by a line of some sort) from the other options?

Thank you.

[ThiefMaster]

That sounds like a good idea! These extra themes are provided by a plugin and there's already a user_visible flag that determine whether a theme goes into the short list or not. We could group by events with/without that flag here: https://github.com/indico/indico/blob/master/indico/modules/events/templates/header.html#L41-L42