Bug 971458 - [System2] Instantiable AppWindowFactory
Bug 971554 - [System2] Instantiable SoundManager
Bug 988148 - Hide the mobile connection state if it is emergency calls only and not primary sim
 Bug 971459 - [System2] Instantiable Applications.
Merge pull request #17628 from crh0716/988148

Bug 988148 - Hide the mobile connection state if it is emergency calls only and not primary sim r=alive
Bug 988261 - Hide utility tray on launchapp event
Merge pull request #17607 from nullaus/bug981764

bug 981764
Merge pull request #17680 from luke-chang/988270_appwindowmanager_cause_unit_test_failed

Bug 988270 - The unit test of AppWindowManager will break other tests in system app, r=alive
Merge pull request #17573 from EragonJ/bug-960861-fix

Bug 960861 - mozMobileConnections should not be requisites for airplane ...
Bug 984265 - JSHint fixes for shared/js
Merge pull request #17638 from luke-chang/971458_instantiable_app_window_factory_v2

Bug 971458 - [System2] Instantiable AppWindowFactory, r=alive
Bug 976413 - [System2] Add start/stop methods to ActivityWindowFactory
Bug 963003 - Fix attention screen height on software home button shown
Merge pull request #17684 from luke-chang/976413_start_stop_activity_window_factory_v2

Bug 976413 - [System2] Add start/stop methods to ActivityWindowFactory, r=alive
Bug 971512 - [System] Instantiable layout manager
Merge pull request #17578 from Rik/sms-sound-930364

Bug 930364 - standard text message sound is jarring r=julienw
Merge pull request #17641 from rexboy7/bug-971512-1.4

Bug 971512 - [System] Instantiable layout manager
Bug 971072 - [VDR] [BB] update modals with new Buttons BB
Merge pull request #17652 from rnowm/VR-modals

Bug 971072 - [VDR] [BB] update modals with new Buttons BB r=pivanov
Bug 897352 - [gaia build system] Transition to a build_stage for assembling apps

Conflicts:
	Makefile
	apps/communications/build/build.js
	build/copy-build-stage-manifest.js
	build/test/integration/distribution.test.js
	build/utils-xpc.js
	build/utils.js
	build/webapp-manifests.js