Merge pull request #12417 from evelynhung/issue-900399

Issue 900399 v1 train (cherry picked from commit 2cae0622ee942906daaca90293441afdbd2cb7de)
(cherry picked from commit 7ddf9a8d3826c07b5bf303a3501dbe969d3c5727)
Bug 924420 - Fixed failing settings/test_settings_change_keyboard_language.py
Merge pull request #12697 from evelynhung/issue-900399-v1.2

Merge pull request #12417 from evelynhung/issue-900399
Merge pull request #12726 from teodosia/bug-924420

Bug 924420 -  Fix failing settings/test_settings_change_keyboard_language.py on aurora
Merge pull request #12226 from darchons/bug916205-create-and-enable-dynamic-ua

Remove UA override list from Gaia(cherry picked from commit 18bd102d833e858e97d60db5c05607e172a10859)
bug 918320 - Add bg, bn-BD, it, mk, zh-CN to v1.2 builds
Bug 924367 -  Fix videoplayer tests on aurora
Bug 925341 - Updated test_ftu_with_tour.py to handle new step for e.me on aurora
Merge pull request #12741 from jaoo/923161

Bug 923161 - Emergency calls not performed with some no-line SIM cards. r=etienne(cherry picked from commit 0fff8ad020a1934cae557155c951d73fb0887b8f)
Merge pull request #12604 from jmcanterafonseca/fix_facebook_messaging

Bug 910112 - [B2G][Contacts]When click message button for facebook a con...(cherry picked from commit d1deec8d52ce46f95cf398b333926e5cbf7ae0b0)
Bug 920890 - getScreenshot delays setVisible
Merge pull request #12781 from alivedise/bugzilla/920890_v1.2/screenshoting

Bug 920890 - getScreenshot delays setVisible, r=vivien, a=koi+
Revert "Merge pull request #12496 from snowmantw/issue921360"

This reverts commit 3d46b7c7ef49f6d66ea25a9383d924e759d15c75.
Merge pull request #12241 from snowmantw/issue903924

Bug 903924 - [Flatfish][LockScreen] add support for large device, r=timdream(cherry picked from commit cbcca1e1e41e291fc9f8a4397da768f0fe41641d)
Merge pull request #12291 from snowmantw/issue917689

Bug 917689 - LockScreen won't slide on B2G desktop and Firefox nightly(cherry picked from commit 8edfa18285f8c36fd6ed783c4e6db81c4c6e9dd0)
Merge pull request #12483 from snowmantw/issue919854

Bug 919854 - [LockScreen] The icon effects isn't obvious enough(cherry picked from commit 026884e5b5b070dfb2532e7cf1984973874f0e74)
Merge pull request #12496 from snowmantw/issue921360

Bug 921360 - [LockScreen] Make the glitches on lockscreen invisible(cherry picked from commit 3d6b5a68a16391f9a2cafb3159d31653f7e7183d)
Merge pull request #12537 from snowmantw/issue919850

Bug 919850 - [LockScreen] Unlock the phone only after user release the handle(cherry picked from commit e06fb8c775fdd0fdcb2e491472df95cbb3a88e58)
Merge pull request #12561 from snowmantw/issue919858

Bug 919858 - [LockScreen] Enhance the UI experiments when unlocking the phone with one hande(cherry picked from commit a95b2eb7a1f9d3ce68ebd98b176bb4a11ce99140)
Merge pull request #12600 from snowmantw/issue921335

[LockScreen] Fix the overlay blue area of the track(cherry picked from commit 272c7f1c60e3a4ef77279fc0c2c68c29ee2cbaa5)