ISLANDORA-1943

Update the datastream table so that it doesn't end up with missing
collumns if you don't have certain permissions.

theme/theme.inc

@@ -53,6 +53,7 @@ function islandora_preprocess_islandora_default_edit(array &$variables) {
       'class' => 'datastream-size',
       'data' => islandora_datastream_get_human_readable_size($ds),
     );
+    if (user_access(ISLANDORA_VIEW_DATASTREAM_HISTORY)) {
       if (islandora_datastream_access(ISLANDORA_VIEW_DATASTREAM_HISTORY, $ds)) {
         $row[] = array(
           'class' => 'datastream-versions',
@@ -60,6 +61,12 @@ function islandora_preprocess_islandora_default_edit(array &$variables) {
             'datastream' => $ds,
           )),
         );
+      }
+      else {
+        $row[] = array();
+      }
+    }
+    if (islandora_datastream_access(ISLANDORA_VIEW_DATASTREAM_HISTORY, $ds)) {
       // Add new datastream content as the lastest version.
       $row[] = array(
         'class' => 'datastream-replace',
@@ -68,6 +75,9 @@ function islandora_preprocess_islandora_default_edit(array &$variables) {
         )),
       );
     }
+    else {
+      $row[] = array();
+    }
     $row[] = array(
       'class' => 'datastream-download',
       'data' => theme('islandora_datastream_download_link', array(