Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  2a28786b43b2c707515e9f0d0cf32b1019e57c37

Put the Minerva-on-desktop Beta Feature under a feature flag

Follow-up to If3c896e56de68b.

Change-Id: Iada5a17c9d63a7ec75d8bcc882e61f4e9764b8bd