Updated mediawiki/extensions
Project: mediawiki/extensions/UniversalLanguageSelector  1b8d0eb169b10dcfd8d7118ce16ac9d1b6d25ea7

Remove Arial fontfamily style for buttons

This came from Agora button styles. Explicit font style for buttons
prevent them to inherit font family style from parents.

Change-Id: I81833273ea7f7f865d04d56d2156df0852373110