Dialog widget fix

Dialog widget fix

the diff is below, basically the issue was that the "open" event was
not getting the event or ui arguments sent to it.
@@ -216,7 +216,7 @@
        return self;
    },
-    open: function() {
+    open: function(event) {
        if (this._isOpen) { return; }
        var self = this,
@@ -258,7 +258,7 @@
            .filter(':first')
            .focus();
-        self._trigger('open');
+        self._trigger('open', event, self);
        self._isOpen = true;
        return self;
--