ISLANDORA-171 Added a comment to explain tab activation code.

CollectionClass.inc

@@ -412,6 +412,8 @@ class CollectionClass {
     $results = $this->getRelatedItems($this->pid, NULL);
     
     $collection_items = $objectHelper->renderCollection($results, $this->pid, NULL, NULL, $page_number );
+    
+    // Check the form post to see if we are in the middle of an ingest operation.
     $show_ingest_tab = (!empty($_POST['form_id']) && $_POST['form_id'] == 'fedora_repository_ingest_form')
                         && (!empty($_POST['op']) && $_POST['op'] == 'Next');
     $add_to_collection = $this->getIngestInterface();