added default, changed sorting

includes/utilities.inc

@@ -759,11 +759,12 @@ function islandora_get_content_models($ignore_system_namespace = TRUE) {
  *   the name of the Drupal variable holding selected content models
  *   Content models held in this variable will appear at the top of
  *   the displayed list
- *
+ * @param array $default_values_array
+ *   default values to display if $drupal_variable is unset
  * @return array
  *   Drupal form element allowing content model selection
  */
-function islandora_content_model_select_table_form_element($drupal_variable) {
+function islandora_content_model_select_table_form_element($drupal_variable, $default_values_array = array('')) {
   $defaults = array();
   $rows = array();
   $content_models = array();
@@ -773,19 +774,24 @@ function islandora_content_model_select_table_form_element($drupal_variable) {
     $content_models[$option['pid']] = $option['label'];
   }
 
-  $selected = array_values(variable_get($drupal_variable, array('')));
-  foreach ($selected as $selection) {
-    if (isset($content_models[$selection])) {
-      $content_models = array($selection => $content_models[$selection]) + $content_models;
+  $selected = array_values(variable_get($drupal_variable, $default_values_array));
+  $comparator = function ($a, $b) use ($selected) {
+        $a_val = $b_val = 0;
+        if (in_array($a, $selected)) {
+          $a_val = 1;
         }
+        if (in_array($b, $selected)) {
+          $b_val = 1;
         }
-
+        return $a_val = $b_val;
+      };
+  uksort($content_models, $comparator);
   foreach ($content_models as $pid => $label) {
     $rows[$pid] = array(
       'pid' => $pid,
       'title' => $label,
     );
-    in_array($pid, $selected) ? $defaults[$pid] = TRUE : $defaults[$pid] = FALSE;
+    $defaults[$pid] = in_array($pid, $selected);
   }
   $header = array(
     'pid' => array('data' => t('PID')),