[Users] How to modify open attachment prefix

[Daniel Hrbac]

Hello,

with latest claws-mail on lubuntu the received attachments are opened
and prefix is added to the filename. thus when i receive file
"hello.odt" and open it in libreoffice it is opened in temporary folder
with name like 00000000a.hello.odt 

Is there a way how to turn this feature off? Or option to modify the
logic of the added prefix?

Thank you,

Daniel