[Users] Lock mail 'unread' status ?

[mi]

Hello,

Can i lock the 'unread' status of a mail ? It's about mails which are important and i already looked into them but but i still can't deal with them ATM.

With 'unread' i will see them in bold font, and pay more attention.

I've tried 'mark as unread' then 'lock' but it still switches to status 'read' when i'm opening the mail (watching the mail text).

Claws 4.1.0