Fixed some reference leaks of attachments. I also moved from using
[modest] / po /
drwxr-xr-x   ..
-rw-r--r-- 580 ChangeLog
-rw-r--r-- 1806 Makevars
-rw-r--r-- 4233 POTFILES.in
-rw-r--r-- 24050 en_GB.po