[Follow-up] Bug 1017027 - [Flame][Settings] - Fuzzy images
Bug 1015405 - Fixing incorrect naming of visually complete event
Bug 1018498 - Hide drawers when transformed off screen. r=kgrandon
Bug 1017893 - Fix broken references in FTU unit tests. r=fcampo
Merge pull request #19816 from pivanov/bug-1017027-followup

[Follow-up] Bug 1017027 - [Flame][Settings] - Fuzzy images, r=evelyn
Merge pull request #19794 from mihai/bug_1017893

Bug 1017893 - Fix broken references in FTU unit tests. r=@fcampo
Merge pull request #19840 from eliperelman/bug-1015405-settings-implement-new-perf-events

Bug 1015405 - Fixing incorrect naming of visually complete event r=hub,arthur.chen
Bug 1017314: Load tutorial config in a loadConfig method.

* New unit tests, fixes existing FTU tests with setup.js and misc path/dependency issues
* Start tutorial preload in ftu UIManager.init
* Use l10nKey as property name in config
* Refactor Tutorial to loadConfig/ensureConfig and update tests accordingly
* Use shared mock_navigator_moz_setttings, delete the ftu one as its no longer used (c.f. bug 1017893)
* Remove unused data-maxstep attributes.