Title: Fixed problem when forwarding notification mails in windows
Level: 2
Component: notifications
Version: 1.2.3i7
Date: 1383911035
Class: fix

Some filenames for the inline images in notifaction mails could contain
forbidden characters, e.g. fs_/home
When forwarding the mails the images got removed.
This has been fixed by quoting these special filenames from now on.
