Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  a04753105ef6d3f4e8ae3101950c4927c31c1f37

Hygiene: Use partial for cancel button

This makes it much easier to change the underlying markup rather than
have to change in various places.

I will need to change the markup as part of the migration to use
mediawiki ui icons

Change-Id: Icbe84702c8e78289ce79263b8d7e16f55a033024