Album's last_update_date is never updated

[DragonByte Tech]

Affected version

2.3.5

From what I can tell, xf_mg_album :: last_update_date is never actually updated anywhere. It's not even set on album creation.

Suggested Fix:

Index: src/addons/XFMG/Entity/Album.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/src/addons/XFMG/Entity/Album.php b/src/addons/XFMG/Entity/Album.php
--- a/src/addons/XFMG/Entity/Album.php
+++ b/src/addons/XFMG/Entity/Album.php
@@ -927,6 +927,8 @@
                 $this->view_privacy = 'inherit';
             }
         }
+       
+        $this->last_update_date = \XF::$time;
     }
 
     protected function _postSave()