[Users] Is it possible to automatically fetch mails in background?

[Mateusz Konieczny]

I want to fetch mails every X minutes in background, without making
claws-mail GUI visible.

I found --receive-all parameter but I see no way to run claws-mail in
headless mode (or at least keep GUI hidden).

I want to solve problems of (a) claws-mail frozen during fetching mails
(b) long wait for mails during fetch.

I hope that with cyclic fetching once I open GUI and I will want to
check mail wait time will be lower.