Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  aa69785eb810ee712203b08e70b4025030ba33f9

Regression: fix notifications header in stable

Header in stable prints HTML:
  <strong>Notifications</strong> <span>undefined</span>
This regression was caused by a regression fix in 6d199f6.
Fixing just in case new overlays in stable are not merged in time.

Change-Id: I13ad4becf2ec5a9795d65a689b6c99bf9e5f9e6d