Bug 942573 - [Settings] Feedback: improve wording when feedback is complete

Updated string from :matej
Bug 981993 - intermittent fail in improve_settings_test.js
Merge pull request #16798 from julienw/974733-sending-sms-activity-v2

Bug 974733 - [Sora][Message]The conversation message display wrong after...
Merge pull request #17062 from EragonJ/bug-981993

Bug 981993 - intermittent fail in improve_settings_test.js
Bug 971497 - [System2] Instantiable HomeGesture r=alive
Bug 980456 - [B2G][FTE][Date & Time] Continent and city selections aren't displayed highlighted
Merge pull request #17005 from KevinGrandon/bug_971497_system2_home_gesture

Bug 971497 - [System2] Instantiable HomeGesture r=alive
Revert "Bug 971497 - [System2] Instantiable HomeGesture r=alive"

This reverts commit aca50fb3c70966b5f0ec1e808a0174eb34fe83ac.
Bug 981440 - Add a CSS linter to the build system. r=ochameau
Merge pull request #17007 from vingtetun/bug981440

Bug 981440 - Add a CSS linter to the build system. r=ochameau
Merge pull request #17014 from flodolo/bug942573_feedbackstring

Bug 942573 - [Settings] Feedback: improve "Thank you" message
Merge pull request #17038 from flodolo/bug975637_ftuselection

Bug 980456 - [B2G][FTE][Date & Time] Continent and city selections aren't displayed highlighted
Bug 981711 - [Messages] Bug 947180 broke the SIM switch r=schung

This patch restores the SIM switching functionality using the iccId property.
Bug 947139 - [DSDS][Message] Send message via default SIM r=schung