* remove inline style in roster template

* remove inline style from contacts panel

* remove inline-css from roster_filters

* remove inline style in trimmed chats

* remove last inline style from minimized chats

* update converse.css

* update changelog

* save unread message count (num_unread) to server

* update CHANGES.md

Hovering is not supported on touchscreen devices.

This will make the unread messages feature work.
Update so that new chats are opened in the background.

Ensures that max one chat box is visible at any given time.
For use in mobile or fullscreen applications.

with lodash and Backbone.

Looks like now that we use Backbone.Events we don't get event objects passed
to the handlers.