Bug 974733 - [Sora][Message] We should not change panels when handling the "sending" event on the window that does not send the message r=schung

When the user presses the "send" button, we set a boolean, so
that when we receive the "sending" event, we know whether we're in the same
window.

(cherry picked from commit a8c1a5ad0936cf5c131afaf2bb5cf6b068e8535d)

Conflicts:
	apps/sms/js/thread_ui.js
	apps/sms/test/unit/thread_ui_test.js
Bug 983038 - Play DTMF tones using active call's SIM card on multi-SIM devices r=etienne
Bug 894744 - Use localStorage event to make inter-page communication between music app and music activity
Revert "Bug 894744 - Use localStorage event to make inter-page communication between music app and music activity"

This reverts commit db1715fcaf132b22ebdf12873564b0cfe42699ac.
Merge pull request #16745 from julienw/974733-v1.3-sending-sms-activity

Bug 974733 - [Sora][Message]The conversation message display wrong after...
Merge pull request #17288 from arcturus/bug-983777

Bug 983777 - [B2G][Contacts] Tapping the Favorite button on an imported facebook contact will break the Edit Contact button
Bug 983760 - Dont show crash screen if tab is not currently active. r=daleharvey
Bug 975161 - Reland ensure SIM Pin inputs are visible. r=vingetun

This reverts commit 05337d2ce75651550892ca883030548ed5f7d6aa.

Conflicts:
	apps/system/test/unit/statusbar_test.js
	build/jshint/xfail.list
Merge branch 'v1.3' into v1.3t