Bug 989065 - [System] Fix wifi_test.js when run in its own sandbox
Bug 988034 - Double clicking on wallpaper activity causes activity menu to reappear r=alive
Bug 971554 - [System2] Instantiable SoundManager
Merge pull request #17729 from KevinGrandon/bug_989065_wifi_test_sandbox

Bug 989065 - [System] Fix wifi_test.js when run in its own sandbox r=alive
Bug 964653 - (system-dialog) [Window Management] Implement System Dialog Window
Merge pull request #17732 from KevinGrandon/bug_988034_system_multiple_action_menus

Bug 988034 - Double clicking on wallpaper activity causes activity menu to reappear r=alive
Merge pull request #17790 from huchengtw-moz/system2/Bug_971554_reland-master

Bug 971554 - [System2] Instantiable SoundManager, r=alive
Merge pull request #17788 from ian-liu/system2/bug964653_system_dialog_refactor_

Bug 964653 - (system-dialog) [Window Management] Implement System Dialog Window, r=@alivedise
Bug 971512 - [System] Instantiable layout manager
Merge pull request #17700 from rexboy7/bug-971512-1.4

Bug 971512 - [System] Instantiable layout manager
Bug 937442 - (lockscreen-window) [Window Management] Implement LockscreenWindow to manage LockScreen