URI field in the Import from URL form should be mandatory

The URI field it is checked in the hook_validate_form, but it does not appear as mandatory in the form itself. See screenshot below:

The field could be marked as required in the form: function patterns_import_url() (includes/forms/import.inc l.224):

  $form['pattern_uri'] = array(
    '#type' => 'textfield',
    '#title' => t('Specify an URI'),
    '#description' => t('Import a pattern from a remote URL. Imported patterns are not executed until you run them manually.'),
    '#size' => 48,
    '#required' => TRUE,
  );

I will create a branch of the code at github, take a look at it and provide a patch with the solution to be committed to drupal.org if everything is ok.