Updated mediawiki/extensions
Project: mediawiki/extensions/GettingStarted  2f33a18fe9a850974ac018b1a0acf308818a6c0b

Use blue button for Return To link

Use guider_button class to style link as blue button because we
can't include the Agora extension yet.

Patch 2:
Changed order of class attachment to improve DOM lookup efficiency

Change-Id: If0191fcde6bfe7ef661868566ab4678e07236dac