// Short-circuits `_focusTabbable` to focus on the modal itself instead of
// elements inside the modal. Without this, if a datepicker is the first input,
// it'll immediately pop up when the modal opens.
// See this ticket for more info: http://bugs.jqueryui.com/ticket/4731
$.ui.dialog.prototype._focusTabbable = function() {
  this.uiDialog.focus();
};