Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  35faeaf569bdc23dbfaf6b24af0773b7b2470381

Story 805: Move Left Nav grouping to Stable

Also fix a bug in the process.

Bug: 51261
Change-Id: I19bc98fddee46d4e80546f200144fcc15522b278