Bug 952591 - [Messages] Selecting 'Send email' from a message that conta...

...ins an email address does not launch Email app. r=julienw

https://bugzilla.mozilla.org/show_bug.cgi?id=952591
Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
(cherry picked from commit a9238975daee10ee5c20e703db0cfee76ae6a7ea)
Signed-off-by: Rick Waldron <waldron.rick@gmail.com>

Conflicts:
	apps/sms/test/unit/thread_ui_test.js