Improve the muc list

Currently, /list is pretty neat, but lacks usability. For example, /list conference.jabber.org is pretty much unusable.
I think that it would be cool to be able to sort rooms depending on their name, or their number of participants, if available (or even a search feature).
Also, support for Page up / page down in order to go up and down one page of rooms would be great.

• Changesets:
  • Revision 15f73406 by louiz on 2011-01-01T15:37:35Z:

fixed #1901  Alt-U and Alt-Y scrolls the participant-list in MUCs