Fix quota update on group file upload (Bug #1479178)

There was a problem with group update where the group quota data was not
getting updated when uploading a file due to caching.

Change-Id: I96ee13b39d815c126f3ff1689f413eb20b0f1c76
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>

htdocs/lib/form/elements/filebrowser.php

@@ -987,7 +987,7 @@ function pieform_element_filebrowser_upload(Pieform $form, $element, $data) {
     $result['uploaded'] = true;
     $result['newlist'] = pieform_element_filebrowser_build_filelist($form, $element, $parentfolder, $newid);
     if (defined('GROUP')) {
-        $group = group_current_group();
+        $group = group_current_group(false);
         $result['quota'] = $group->quota;
         $result['quotaused'] = $group->quotaused;
     }

htdocs/lib/group.php

@@ -1834,11 +1834,15 @@ function group_param_userid($userid) {
     return $userid;
 }
 
-
-function group_current_group() {
+/**
+ * Fetch the current group
+ *
+ * @param string $cache  Set to false to override cache
+ */
+function group_current_group($cache=true) {
     static $group;
 
-    if (isset($group)) {
+    if (isset($group) && $cache) {
         return $group;
     }