Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  a2f989837bd00351dd26996d95021dc61bffab27

Hygiene: Fix method chaining code style

As we can see in here:
https://www.mediawiki.org/wiki/Manual:Coding_conventions/JavaScript#Creating_elements

Change-Id: Iba2fab07157539edb389d2960f5940ec2b0d8c7c