Merge pull request #16938 from crdlc/bug-978011

Bug 978011 - Unload properly Image Loader when syncing/importing
Merge pull request #16982 from steveck-chung/bug-973007

Bug 973007 - [B2G] [Messaging] Keyboard appears when accessing the contact list from the compose message screen. r=julienw
Merge branch 'v1.3' into v1.3t