Updated mediawiki/extensions
Project: mediawiki/extensions/CentralNotice  e118f46ef1d6088a121ec63354486c42aae30c22

(FR #1014) Disable banner preview and rough out new method

We will load screenshots from an archive.  If no screenshot provider is
configured, do not display previews.

Change-Id: I185fa242c1b4347c00c7b281eab32c621479f742