[Users] Messages in Draft folder are not treated as drafts

[mahlamytsike at gmail.com]

I use a Gmail IMAP account in Claws Mail.

My goal is to be able to use Draft messages both on the phone and in Claws Mail at the same time. 

I set it up for that:

Configuration → Preferences for Current Account → Account → Advanced → Put Draft messages in → "#imap/mahlamytsike at gmail.com/[Gmail]/Drafts"

Now when I edit messages in Claws Mail, it puts them correctly to [Gmail]/Drafts. Then, when I want to edit these drafts in [Gmail]/Drafts with Claws Mail, I get message viewer window, not editor window.

How can I set up custom Drafts folder in Claws Mail ?

Thanks !