fix "back to menu" on S:InterwikiEdit
PLA-1849 - Increase Og:Description length to 500 chars
VOLDEV-91: Remove "Does this page answer your question" footer
PLA-1909 Fail early, fail hard

* Forcing type in function declaration
* Making sure that WikiService returns array according to PHPDoc
Added opt in/out page for Mercury
It's fill of new lines
update of menu-aim library - with fix for window scroll
Linting WikiaGptAdDetect.js
Merge pull request #4850 from Wikia/PLA-1909

PLA-1909 Fail early, fail hard
ADEN-1424 Allow for GumGum hop
ADEN-1425 extend RTP to more countries
ADEN-1424 Added a test for MessageListener.register without matching source frame
Merge pull request #4865 from Wikia/aden-1424-gumgum-footer-hop

Aden 1424 gumgum footer hop
Merge pull request #4866 from Wikia/aden-1425-extend-rtp-to-more-geo

ADEN-1425 extend RTP to more countries
CE-1068 Log Fatals caused by null returned by GlobalTitle::newFromId
Merge pull request #4801 from Wikia/PLA-1849

PLA-1849 - Increase Og:Description length to 500 chars
Merge pull request #4867 from Wikia/CE-1068-ImageReview-Fatals-Logging

CE-1068 Log Fatals caused by null returned by GlobalTitle::newFromId
Merge pull request #4835 from WikiaVolDev/VOLDEV-91

VOLDEV-91: Special:Contact/bad-ad should not have the "Does this page answer your question?" footer
PLA-1909 Kill swagger warning coming from character case difference
PLA-1909 change docblock too