Language button should use a new id to identify itself

This breaks existing integrations with extensions which will need
to be revisited as part of this redesign.

Change-Id: Iabf627e6926d4574f27448400d76210386ebdaa2

includes/SkinVector.php

@@ -237,6 +237,7 @@ class SkinVector extends SkinMustache {
 				count( $this->getLanguages() )
 			)->parse();
 			$portletData['icon'] = 'language';
+			$portletData['id'] = 'p-lang-btn';
 		}
 		$class = $portletData['class'];
 		$portletData['class'] = trim( "$class $extraClasses[$type]" );

resources/skins.vector.styles/layout-default.less

@@ -81,7 +81,7 @@ body {
 .mw-body-header {
 	.mixin-clearfix();
 
-	#p-lang {
+	#p-lang-btn {
 		float: right;
 	}
 }