Bug 960861 - mozMobileConnections should not be requisites for airplane mode

- add Radio.js
- add Radio related tests
- use this radio service in ariplaneMode
Bug 968912 - Make an app object for FTU and write a test for desktopb2g/CI
Bug 972699 - Fix unit test zero coverage when using lazy load
Bug 984111 - JSHint fixes for shared unit test mocks
Bug 939791 - [settings] keyboard: {{type}} in mustHaveOneKeyboard is empty for text keyboards
Power-button-modal
Bug 986512 - Switches [BB] remove transition
Bug 986473 -Modify cost control parameters
Bug 971554 - [System2] Instantiable SoundManager

Conflicts:
	apps/system/js/bootstrap.js

Conflicts:
	apps/system/test/unit/bootstrap_test.js
	build/jshint/xfail.list
Merge pull request #16947 from dwi2/bug976986

Bug 976986 - SettingsListener should have unobserve() method
Bug 981965 - Remove browser menu top

Conflicts:
	apps/system/style/window.css
Merge pull request #17494 from gasolin/sheriff971554

Bug 971554 - [System2] Instantiable SoundManager, r=alive
Merge pull request #17495 from gasolin/sheriff976986

Merge pull request #16947 from dwi2/bug976986, r=timdream
Merge pull request #15550 from EragonJ/bug-960861

Bug 960861 - mozMobileConnections should not be requisites for airplane ...
Merge pull request #17496 from gasolin/sheriff981965

Bug 981965 - Remove browser menu top, r=timdream
Bug 961800 - Implement Child Window Factory.

Conflicts:
	apps/system/js/app_transition_controller.js
	apps/system/js/app_window.js
	apps/system/js/app_window_manager.js
	apps/system/js/cards_view.js
	apps/system/style/window.css
Merge pull request #16891 from RickyChien/bug-972699

Bug 972699 - Fix unit test zero coverage when using lazy load r=@yurenju
Revert "Merge pull request #17494 from gasolin/sheriff971554" for gaia-unit failures

This reverts commit c377f41d017d4b099e92fd7ecf67d9cd1cee1292, reversing
changes made to 3286e2a0cbcac52e38c0494ab614bac23cdc229f.
Merge pull request #17418 from alivedise/bugzilla/961800_master_merging/child-window-factory

Bug 961800 - Implement Child Window Factory, r=etienne
Bug 979914 - Investigate failure in test_cost_control_reset_wifi