Merge pull request #12242 from crdlc/bug-916690

Bug 916690 - Reduce memory consumption with a lazy load of the dragdrop and wallpaper components(cherry picked from commit 1518b76c07c4d70fc41113ed2e424a74b2bcef27)
Merge pull request #12274 from flodolo/bug917198_master

Bug 917198 - inconsistent use of "OK" and "KB" across Gaia apps and settings, r=kaze(cherry picked from commit 29aad9e4e63210105d3cac6d7e7a5748a7d68351)
Merge pull request #12246 from crdlc/bug-916782

Bug 916782 - Remove progress_activity.css and status.css from homescreen (it is only needed for ev.me)(cherry picked from commit 2e88444c39998e0b90513ad9f8ab9413f3fe246f)
Merge pull request #11860 from rnowm/821673

Bug 821673 - Redesign back, menu and close buttons(cherry picked from commit f576c1289c2fe78cebaafd12f22cc26edcd23f3e)
Merge pull request #12260 from crh0716/908556

Bug 908556 - Block the pairing request when there is already one r=evelyn(cherry picked from commit 70e49877b1b8532b07562ef30b7e9d9b0eb18aa7)
Merge pull request #12419 from rnowm/920393

Bug 920393 - Headers [BB] wrong margin in left button(cherry picked from commit 1205faaebe0133333a8a14b9b3d895156438645e)
Merge pull request #12389 from crdlc/bug-919933

Bug 919933 - [Homescreen] Lazy load shared/js/omadrm/fl.js(cherry picked from commit 1c3a280b4934b11f666d95ce095e465ff3d8ef72)
Merge pull request #12391 from crdlc/bug-919951

Bug 919951 - DateTimeFormat is no longer needed after deleting the clock in the landing page(cherry picked from commit 58b107212d1fe57d6215be1e53d5bff69e5a53f3)
Merge pull request #12359 from gasolin/issue-919455

Bug 919455 - tablet wallpaper are stretched, r=yurenju(cherry picked from commit b91e78d35037c68d06f8f59176221efd101ebf85)
Bug 919567 - Stopwatch and Timer Panels do not update from underlying data objects

r=jugglinmike
(cherry picked from commit 43c9c569d99f7124cc7c32afc96f52a97b3d4296)
Merge pull request #12344 from overholt/master

Bug 878700 - Untranslated text in 'Enter PIN' screen r=fcampo(cherry picked from commit c357e33b00d1c54774a4b0083b49457fad47afd6)
Merge pull request #12459 from hotzenklotz/917387_bluetooth_image

Picture in preview shows zoomed in when user opens picture received via ... r=davidflanagan(cherry picked from commit e19bcb49cb6463c9284d26f7df1e3e5c4c3cdcac)