Bug 991949 - Cell broadcast ETWS messages show undefined

ETWS messages without a message body use a canned body depending on the
warning type.

Change-Id: I25491fd85894d334bd6a9ab63105379de495ef2a
Bug 1023053 - [Calendar] Clean up useless images
Bug 1022746 - Remove requestAnimationFrame from FontSizeUtils to fix frames falling back to sync panning and zooming. r=vingtetun
Bug 997240 - added proper screen reader semantics to the homescreen's pagination bar.
Bug 970119 - Do not autopunctuate after a newline
Bug 1019362 - adding a number of gaia ui tests for the first time use app accessibility.
Bug 1017832 - Properly use 'content' channel for playing sound on Find My Device.
Bug 1023730 - (Part I) Move LayoutLoader to another script
Bug 1023730 - (Part II) currentModifiedLayout in LayoutManager
Bug 1023730 - (Part III) Remove inputContext from global
Bug 1023730 - (Part IV) Remove layoutPage from global
Bug 1023730 - (Part V) Remove currentInputMode from global
Bug 1023730 - (Part VI) Remove currentInputType from global
Bug 1023730 - (Part VII) Remove keyboardName and currentLayout from global
Bug 1023730 - (Part VIII) Correct property naming for render.js
Bug 1023812 - Find bottom most window to do open/close operation when activity done
Bug 1015846 - [Vixen][Tablet] Camera preview rotate 90 degrees in camera app
Bug 1025835 - [Vertical Homescreen] Loading animation while downloading app is broken
Bug 1016407 - [Calendar] Fix unit tests with a newer mocha r=lightsofapollo
Bug 1014517 - Execute the single variant customization th first time a configured SIM is inserted