Fixes bug 1032044, Errors on build/webapp-manifests.js r=yurenju
Bug 1034560 - Utility tray is closed when the airplanemode button is pressed
Bug 1048673 - [Ringtones] stop the previews before leaving the app
 Bug 1048682 - Fix failing jspinyin unit tests.
Merge pull request #22442 from sudheesh001/Patch_1032044

Fixes bug 1032044, Errors on build/webapp-manifests.js r=yurenju
Merge pull request #22506 from RudyLu/keyboard/Bug1048682-jspinyin_unit_tests

Bug 1048682 - Fix failing jspinyin unit tests.
r=yxl.
Merge pull request #22475 from EragonJ/bug-1034560-another-try

Bug 1034560 - Utility tray is closed when the airplanemode button is pre...
Merge pull request #22505 from dominickuo/bug-1048673

Bug 1048673 - [Ringtones] stop the previews before leaving the app, r=jimporter
Bug 1032071 - [Settings] Remove BT panel and embed it from BT app