Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  666cc540f38f0b5340893fb61afaf95f81f1f8a3

QA: Actually ensure we test the watch star feature

The previous test was a false positive. Also rewrite some of the rules
to make it clearer what they in fact test.

Change-Id: Iffe3f3838bb3ace18a09d4e32e7c27be11bf2f3f