Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  37f707c52530857c097ffbea77353fa1561c1787

PhotoUploaderButton uses events map

Depends on a Mantle patch, do not merge until this one is:
https://gerrit.wikimedia.org/r/181734

Change-Id: Ica2329761d968098b1c98fcc5ab4c4cd1e69d7f6