Neomutt/mutt copy message-id with b4

[Maciej Wieczór-Retman]

Hi!
I was thinking on how to make using Neomutt 
easier with b4 to apply patches for testing. 

In thunderbird there is an extension
that creates a button, that copies the message id.
This way I was able to paste that message-id into 
b4, and apply a whole patch series to my kernel 
source quickly. 

In neomutt I have the message-id in the header 
field and I can copy it with the mouse but 
I was curious if anyone found a nice 
macro with a keybind to just copy the 
message-id directly to clipboard?

Googling didn't give me any results, and neither
did looking through mail archives.

Kind regards
Maciej Wieczór-Retman