Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  a359a9b03aeec5095a2ec0783c9946ea7d8a54c2

Add more comments and rename some variables in OverlayManager

This should make it a bit easier to follow the code.

Change-Id: Icfb0686ebfaa994bace1008c2d9496b49c3b9bbc