[8751] Implement proper creating mail text copy item from mail template based mail.

src/game/DBCStructure.h

@@ -1069,7 +1069,7 @@ struct MailTemplateEntry
     uint32      ID;                                         // 0
     //char*       subject[16];                              // 1-16
                                                             // 17 name flags, unused
-    //char*       content[16];                              // 18-33
+    char*       content[16];                                // 18-33
 };
 
 struct MapEntry