Until now, new days were only indicated for messages received on different days
*after* the day's messages.

when auto_reconnect = false

The filter was being hidden if the roster was not big enough to require a
scrollbar, but the roster might not be big enough because the roster is
actually being applied.

Solves a weird problem I've encountered with PubSub and Prosody, whereby a
returned HTTP response is not received by the browser. Underlying cause is
still unknown, but is BOSH related and it appears to be that the HTTP request
being responded to by Prosody is no longer open/valid.

* feature add catalan language

* feature add catalan language

In the process I had to refactor some methods which required the mock
connection of tests to be changed as well.

Remove interval handler and the user activity handler.
Make sure the connection is reset when logging out.
Also removed the reconnectTimeout, instead debounce the reconnect method by 1 second.

Otherwise maximized chats are scrolled to the top, showing the oldest messages.

Ideally we'd probably like to remember the scroll position, and show that, but
this would require some significant refactoring.

Otherwise the hide event can prevent a consecutive show event.
This bug becomes apparent when maximizing a minimized chat in a screen with not
enough space.

Another box will have to be minimized, which causes first a hide and then a
show event on the minimized chats toggle.

- Don't call show in a room's initialize method (instead let the code be more
  similar to normal chats, in that it should listen to the "show" trigger).
- Rename chatBoxShouldBeShown to chatBoxMayBeShown
- Implement auto_join for rooms only once boxes have been fetched already.