Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  c0c021219dc44605dbb1a406ef4722f8cc80c13a

[Browser test] Retry loop for beta warning dismissal.

Tests run via SauceLabs do not always dismss beta warning
pop-up on the first attempt, so try and try again!

Change-Id: I074824c5f1c99d8e5408dcb1ada7b97a6d20ebe8