Media JS: Prevent infinite scroll events from being unbound when Attachments views are re-rendered. see #21390.

git-svn-id: http://core.svn.wordpress.org/trunk@21908 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/media-views.js

@@ -540,6 +540,9 @@
 		},
 
 		render: function() {
+			// Detach the list from the DOM to prevent event removal.
+			this.$list.detach();
+
 			this.$el.html( this.template( this.options ) ).append( this.$list );
 			this.refresh();
 			return this;