Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  469cb4aa9987022299b326986430d1291d2970ae

Add reference icon

Objectives:

* Introduce new icon for a reference
* Repurpose existing reference icon for references block

Change-Id: I1bfcdbeda3b9730d62d6b264ef72921e93623f7e