MobileContext fixes

Make MobileContext work in standalone with less ugly hacks.

Change-Id: I77081bafb6a21ccb0ef21ba64f823aed809ffd46
Switch mobile demo from deprecated Minerva to MediaWiki

Change-Id: I77d57932785c74b5b7a5de4a2105bbaa177281b8
Merge "MobileContext fixes"
Merge "Switch mobile demo from deprecated Minerva to MediaWiki"