Simple submit handler
Overrides HandlerBase::submitOptionsForm
public function submitOptionsForm(&$form, &$form_state) {
unset($form_state['values']['expose_button']);
// don't store this.
$this
->sort_submit($form, $form_state);
if (!empty($this->options['exposed'])) {
$this
->submitExposeForm($form, $form_state);
}
}