Merge pull request #8726 from leob2g/Bug_852361_Device_is_shut_down_when_battery_level_become_two_percents

Bug 852361 - [System] Device is shut down when battery level become two percents(cherry picked from commit a7f1e921c67d5d3d4e0afaa06aca79320784e806)
Revert "Bug 935307 - [B2G][Contacts] A user is able to retrieve a contact information from Settings screen"

This reverts commit 256dcfe2cbe03640888fb0ca8fd09d3deece4863.
Merge pull request #13673 from KevinGrandon/revert_bug_935307

Revert "Bug 935307 - [B2G][Contacts] A user is able to retrieve a contact information from Settings screen"
Bug 938191 - [B2G][Camera][Thumbnail] Bottom of thumbnail preview contains incorrect UI
Merge pull request #13674 from wilsonpage/Bug938191

Bug 938191 - [B2G][Camera][Thumbnail] Bottom of thumbnail preview contai...
Bug 937941 - [Camera] Add missing flash icon and update to high-res icons in HUD
Merge pull request #13679 from wilsonpage/Bug937941

Bug 937941 - [Camera] Add missing flash icon and update to high-res icon...
Bug 914892 - [Settings] Move checkbox labels inside of labels.

Make pack checkbox/radio/switch use span:after so we could use the span for something useful.
Merge pull request #12418 from eeejay/bug-914892

Bug  914892 - Condense pack-switch/pack-checkbox/pack-radio markup. r=arnau