show system messages in payment pane AJAX form update for payment method

This seems reasonable enough. Would like to get some more eyes on it.

Updating tags. This requires some good old fashioned manual testing :)

This does work for me, all system messages remain intact when dealing with Ajax panes in the form.

Snippet from views/includes/ajax.inc. We're not checking if in AJAX, which it seems to be the issue here. The way error messages are handled by the form outside of AJAX should be working fine.

  if (!empty($form_state['ajax']) && (empty($form_state['executed']) || !empty($form_state['rerender']))) {
    // If the form didn't execute and we're using ajax, build up a
    // Ajax command list to execute.
    $commands = array();

    $display = '';
    if ($messages = theme('status_messages')) {
      $display = '<div class="views-messages">' . $messages . '</div>';
    }
    $display .= $output;

My one wonder would be: what about other panes that do AJAX, will it steal their messages? this might be an issue at core's message storage, but worthy question.

Likely will steal any message sent with drupal_set_message(). Though I'm not quite sure which would win. I have my messages in panels_everywhere pane.