Themes screens: Bump to 20 items per page so it fills a high resolution display. see #26968.

Built from https://develop.svn.wordpress.org/trunk@27744


git-svn-id: http://core.svn.wordpress.org/trunk@27581 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/theme.js

@@ -208,9 +208,9 @@ themes.Collection = Backbone.Collection.extend({
 		var collection = this;
 		instance = instance || 0;
 
-		// Themes per instance are set at 15
-		collection = _( collection.rest( 15 * instance ) );
-		collection = _( collection.first( 15 ) );
+		// Themes per instance are set at 20
+		collection = _( collection.rest( 20 * instance ) );
+		collection = _( collection.first( 20 ) );
 
 		return collection;
 	}