Disable Webfonts too for blacklisted browsers

Change-Id: I9feb342b091e00ef0279333018b86045932d68de

resources/js/ext.uls.webfonts.js

@@ -81,6 +81,9 @@
 	};
 
 	$( document ).ready( function () {
+		if ( !mw.uls.isBrowserSupported() ) {
+			return;
+		}
 		// MediaWiki specific overrides for jquery.webfonts
 		$.extend( $.fn.webfonts.defaults, {
 			repository: mediawikiFontRepository,