Bug 1020109 - Cell broadcast search list is not set correctly

The current code attempts to protect against empty objects incorrectly
since empty arrays are truthy in JavaScript. The result is empty objects
get passed to SettingsLock.set() which seems to break all subsequent
settings change observers.
Bug 996510 - Add system message test case for Bug 906164
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 1021777 - Set multiple search engines by default
Add dom.mozApps.use_reviewer_certs preference toggle
Bug 1022450 - Don't show the "WAP Push Message" string in the header when opening a message
Bug 1020744 - [Dialer][Flame] Enter more than 19 digits in dialer, back delete button moved couple pixels to the left
Bug 1023053 - [Calendar] Clean up useless images
Bug 1022733 - Entry points lost their splash screen/overlay icons

The origin for applications that have different entry points (e.g.,
Dialer and Contacts are the same application, Communications) also
contains a pathname, so we need to remove that from the origin before
appending the splash icon path.
Bug 1023124 - [Flame][Keyboard] - Missing images
Bug 1023146 - [Flame][Settings] - Wifi image update
Bug 1020005: Send 'shrinking-stop' instead of 'shrinking-reject' event whenever 'techLost' event happens.
Also modified respective test case in nfc_manager_test.js. r=gweng
Bug 935636 - Avoid duplicating data on contact merge
Bug 1022746 - Remove requestAnimationFrame from FontSizeUtils to fix frames falling back to sync panning and zooming. r=vingtetun
Bug 1021270 - Focus the top active window while permission dialog hide
Bug 1023545 - [VsD Refresh] Lockscreen Visual Refresh > Time font is too small
Bug 1021270 Part2: Using loaded handler to focus
Bug 1023534 - [VsD Refresh] Lockscreen Visual Refresh > Pin code screen > Camera icon position

note: please land after bug 1023545 lands
Bug 1023448 - [VsD Refresh] Lockscreen Visual Refresh > Notifications background colour picker looks too light
Bug 1016283 - Prevent flash of black when switching layout of the same keyboard