Updated mediawiki/extensions
Project: mediawiki/extensions/Thanks  c89398aa99adfa5bad3dceddfd49be65b3a68f94

Everyone hates Christmas so we're getting rid of it!

Removing red coloration for Cancel button - too garish according to
feedback.

Change-Id: I00beb9f59b931d1becf23cd5a3d62ea9ec98b9b8