Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  2ec5899bbeb7cfff58ed7b8cfbc903c9b8e91e68

Minor fix to progressiveEnhancement

I9cbd8a3ccc63918a31f888b48f2bb8ce9bb92053 cleaned up progressiveEnhancement, but
this seems to have been overlooked.

Change-Id: I93279abc54384dcbb5410db174fd636e98072f3d