Request for "mbox" link/button it series view

[Rafał Miłecki]

Hi,

thanks to Konstantin I learnt magic url syntax for downloading series
as mbox, see:
Re: Feature request: mbox for series
https://lists.ozlabs.org/pipermail/patchwork/2021-September/007237.html

It'd be very convenient to have such a link provided in the UI. We
already have mbox links for patches in patches view. Could you add
similar link to series in a series view?

-- 
Rafał