* Remove some inline CSS style to improve CSP compatibility

* update changelog

https://github.com/requirejs/text/issues/122

This allows for cleaner separation between core and rosterview, making it
easier to remove that plugin for more stripped down deployments.

Similar to how backbone.js does it.

instead of having the ControlBoxView do it. This provides for cleaner
separation between the two plugins.

So that we can also fetch the roster also without the controlbox and rosterview.

When it's not possible to reconnect due to password no longer being cached,
render the login form.

Fixed a bug whereby after one failed reconnection event, reconnection becomes
impossible (due to 'connection' state of the controlbox).

Fall back to working version.

This allows for better desktop notification messages.
Also improved the wording for some of the feedback messages.

after a dropped connection.

- Add new configuration setting messages_storage
- Hardcode the storage for roster contacts and chatroom occupants to `sessionStorage`.

and drop the reconnection timeout to 3 seconds (from 5).

- Added the ability to reconnect to more disconnection causes.
- Make sure the roster is fetched again when reconnecting.