Updated mediawiki/extensions
Project: mediawiki/extensions/Echo  abbfccca0eb8b55046d87a01233afaf5fa22a5b5

Adding dismiss functionality to special page

Includes new web preferences for Echo

Also adding ability to set dismissability per notification type

Still need to arrange subscription options into a friendly format

Still need to add dismiss functionality to flyout

Change-Id: I484a24b424e69be3640e63b76f82735edae6f13a