Bug 919962 - [MMS] Converting to text layout when sending a MMS r=gnarf

We now display the banner in an asynchronous way therefore the previous way to
hide the banner synchronously didn't work.

This patch changes the logic then: instead of hiding the banner after displaying
it, it now prevents the banner from being displayed at all.
Bug 913994 - [Messages] When sending SMS to a number included in a SMS, we should load the thread after clicking on send r=gnarf

The problem was simple: we were not resetting inThread when handling the #new
hash.
Bug 917465 - [Email] launching a mail notification will cause Email app to spin and load forever
Bug 921360 - [LockScreen] Make the glitches on lockscreen invisible
Bug 920944 - Fix b2gperf
Bug 910354 - [e.me][feature] Add Collections