Bug 835410 - [Email UX] Wrong use of spinner when sending an email

* Fix the UX issue : https://bugzilla.mozilla.org/show_bug.cgi?id=835410
* Fix the regression caused by building-block change: Remove the BB style on message syncing/sync more block sine the status style changed a lot and not suitable for these blocks.
* Fix the compose view input regression in setup page layout fixing.