Adding groups to the Users window

[Sopor]

If you have many Favorite users in the Users window, the only way to separate them are by adding a Description. If you instead could create groups and put all users you often download file lists from in one group so you easy could use the context menu on the group and choose "Get file list" or if you create another group you often send private message to and you could use "Send private message". It could open a small window to type the message in and then open the PM window and send the message to each user with a delay of 1 second so it won't crash or spam the server. It would be nice if this was possible in the user list too when i send PM to multiple users.

[Night (night.)]

The listview grouping methods arent so great to handle, especially with thousands of possible items.
And grouping other users than favorites would mean we need to save CIDS for all grouped users.