Bug 925461 - Impossible to use or remove bookmarks added in v1.2 or before r=crdlc

* handle correctly old-style bookmarks
* did better part of the tests
Bug 942973 - [System][Notifications] 1.3 Visual Refresh of Notification Icons
Bug 943000: Update to Dark 1.3 Header
Bug 937613 - [e.me] Collections names are not translated or erased when changing device language [r=crdlc, ranbena]
Bug 939738 - [e.me][bug] Installed app result icons are cut at the bottom [r=ranbena]
Bug 943010 - [Email] Update to the orange 1.3 header
Bug 942107 - Reduce volume and be smarter about our use of locators browser_app
Bug 919530 - [Clock] Dark UI for Settings a new or editing an alarm
Bug 941628 - [Settings] Update background and sub header colour
Bug 939144 - [Action Icons - Communications] Remove shadows from action icons
Bug 941694 - [Download Manager] New library to store the complete downloads
Bug 943996 - Improve wait after tapping update in contacts edit r=Askeing
Fix Bug 943002
Bug 941625 - [Browser] Update background and sub header colour
Bug 941622 - [Contacts] Update background and sub header colour
Bug 932753 - Update test_settings_do_not_track to use new Gecko pref helper methods
Bug 943266 - [Flatfish] dialog menu is bigger than header
Bug 944274 - The self.lockscreen.is_locked is True when user unlock from lockscreen to camera with passcode
Bug 943780 - [Flatfish] Icon missing when Ring incoming calls in sleep menu
Bug 944264 - Xfail test_cost_control_reset_wifi.py