* OPML import: don't reload everything, just feed tree

* dialogs: use auto-destroying dialog for almost all dialogs instead of destroying them manually
* some general dialog-related cleanup

js/SingleUseDialog.js

@@ -0,0 +1,8 @@
+/* global dijit, define */
+define(["dojo/_base/declare", "dijit/Dialog"], function (declare) {
+	return declare("fox.SingleUseDialog", dijit.Dialog, {
+      onHide: function() {
+         this.destroyRecursive();
+      }
+	});
+});