Drag select multiple channels

I think being able to drag and select multiple channels could be key for developers. Say if you want multiple categories to show the same rooms but have different permissions sets on categories (For example, a team-based game community, have multiple categories called "Red team, Blue team, etc.." and being able to create one category and just cloning all the rooms or category).

You could also drag and highlight all these rooms and edit permissions for all of them, across multiple categories. 

You could also drag and highlight all these rooms and select read all, to get rid of those pesky notifications.

This would speed up the development of servers and be extremely useful to admins.