Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  e6ff6d0582ed9dba12ad631ff3ac24219c0421d1

QA: Deal with failing cloudbees test

The language overlay loads asynchoronously. Thus we must delay
the back button press until the language overlay has fully
initialised and can be seen to ensure this test always passes.

See: https://wmf.ci.cloudbees.com/job/
MobileFrontend-en.m.wikipedia.beta.wmflabs.org-linux-chrome
/375/testReport/junit/(root)/Language%20selection/
Closing_language_overlay__browser_button_/

Change-Id: I506d61a6385928db49578d982e78ceb08cc33bc5