Updated mediawiki/extensions
Project: mediawiki/extensions/CentralNotice  c55b9e1ef99b6c56feee671a03e6514e231e54c2

Previews now work in all languages

Fixing a bug which caused the 'preview all languages' link to only
display in english.

Side note... we really need to unify the banner contexts.

Change-Id: I8c7beff27e89e26e6a7420567e1ccb5eff02859d