Bug 966463 - [B2G][Homescreen] Cancelling an app download from Homescreen will result in a grey icon that has no function after a restart

(cherry picked from commit d37ed431d91818ad5f3f91cf8af938c951bef038)
Merge pull request #14322 from KevinGrandon/bug_945777_enable_position_sticky_pref

Bug 945777 - Enable position:sticky in gaia
(cherry picked from commit 4bfe2353566ed2164a97d900649e60f434b0854a)
Merge pull request #15889 from timdream/lockscreen-transitionz

Bug 966711 - Use translateZ() for lockscreen fade-out transition, r=snowmantw
(cherry picked from commit 75e9691f02b9d18585c18a5434beeff39ee7ea20)
Bug 967094 - Expose some prefs related to Tiling. r=kgrandon

(cherry picked from commit 95cc9f7ecb3cd203befd3e942ec266ca1ba6464d)
Merge pull request #15442 from steveck-chung/bug-948958

Bug 948958 - [Messages][MMS] MMS does not display correctly when it has a subject but no content
(cherry picked from commit 014e6c39c69fdc51c08079c9bb3b827664387dcd)
Merge pull request #15879 from arcturus/bug-966445

Bug 966445 - [Contacts] When viewing contact details as an activity (from Messages for example or Rocketbar), launching email activity doesn't work r=bkelly
(cherry picked from commit 43a715293eba2d8b163e228dbb9a109a4dbc19e4)
Merge pull request #15830 from caseyyee/bug-962366

Bug 962366 - Replace software home button with something that is not the...
(cherry picked from commit 6e17d6a0d703c72ddd354134ee0f9e538a8f5aea)
Merge pull request #15837 from gitmai/bug-965792-CC-error-FTE

Bug 965792 -[Costcontrol] Error on FTE when cardState change
r=salva
(cherry picked from commit 9ee1e2833281354e20e93607f83d13ae45d37aec)
Bug 951774 - Add margin to ensure field is visible. r=vingetun

(cherry picked from commit 4062fea3d44f66d2927af884b7b58e1e9bf36c34)