Bug1015448 - [Wallpaper] - Fix wall paper file types and sizes r=patryk
Bug 1012651 - [Contacts] Remove inline style for CSP compliance
Bug 1018367 - [gaia-subheader] Remove "data-" prefix on component attributes
Bug 1016239 - [Collections App][Part 1] Extract dedupe logic from search.js r=ranbena r=armin
Bug 1018997 - Unxfail and fix test_ftu_skip_tour.py
Merge pull request #19879 from viorelaioia/bug_1018997

Bug 1018997 - Unxfail and fix test_ftu_skip_tour.py
Merge pull request #19648 from fcampo/contacts-inline-css-1012651

Bug 1012651 - [Contacts] Remove inline style for CSP compliance (r=jmcf)
Merge pull request #19778 from punamdahiya/Bug1015448

Bug1015448 - [Wallpaper] - Fix wall paper file types and sizes r=patryk
Merge pull request #19834 from yor-mozilla-com/gaia-subheader-remove-data

Bug 1018367 - [gaia-subheader] Remove "data-" prefix on component attrib...
Merge pull request #19734 from KevinGrandon/bug_1016239_part1_extract_dedupe

Bug 1016239 - [Collections App][Part 1] Extract dedupe logic from search.js
Bug 1018515 - Remove google link from search providers. r=kgrandon
Bug 1014638 - Fix the title of SL messages notifications r=julienw
Bug 1017314: Load tutorial config in a loadConfig method. r=borjasalguero

* Start tutorial preload in ftu UIManager.init
* Create per-layout tutorial config file, use l10nKey as title property name in config
* Refactor Tutorial to loadConfig/ensureConfig and update tests accordingly
* Remove unused data-maxstep attributes.