Bug 937495 - [Flatfish][FTU] update images and wordings

- update FTU images
- update wordings
- update CSS
- update images
- add l10nKeySuffix to handle localizations process
Bug 952302 - [Messages] We need to load the gesture detector mock from SMS or shared r=etienne,rwaldron
Bug 956945 - [B2G][Settings] Voicemail number does not update after deleting the number
Bug 952063 - Trigger FxAccountsIACHelper 'onlogin', 'onloginverified' and 'onlogout' events when required. r=alive

Address Alive review comments
Merge pull request #15156 from jaoo/956945

Bug 956945 - [B2G][Settings] Voicemail number does not update after deleting the number. r=kaze
Bug 960660 - Disable jshinting utilities.js and get travis green. r=me
Merge pull request #15463 from ferjm/bug952063.fxa.events

Bug 952063 - Trigger FxAccountsIACHelper 'onlogin', 'onverified' an...
Merge pull request #13695 from EragonJ/bug-937495

Bug 937495 - [Flatfish][FTU] update images and wordings
Bug 941030 - [Messages] Follow up Bug 919966 - Ensure that forwarding a MMS with a subject fills in the subject in the composer
Bug 950101 - TypeError: hiddenContainers[i] is undefined in call_log.js
Merge pull request #14653 from fcampo/mms-forward-subject-941030

Bug 941030 - [Messages] Follow up Bug 919966 - Ensure that forwarding a MMS with a subject fills in the subject in the composer
Merge pull request #15570 from Rik/calllog-missed-950101

Bug 950101 - TypeError: hiddenContainers[i] is undefined in call_log.js r=etienne
Bug 956648 - Remove timeouts from tests r=julienw
Merge pull request #15582 from julienw/952302-fix-gesture-mock

Bug 952302 - [Messages] We need to load the gesture detector mock from S...
Merge pull request #15422 from KevinGrandon/bug_956648_remove_test_timeouts

Bug 956648 - Remove timeouts from tests