It is simply annoying to have sometimes "i" and always "q" to exit a
menu (view) in neomutt. Instead this change normalizes that by removing
_any_ functionality from "q", except of quitting neomutt on the index.
In turn "i" becomes the only binding to exit a menu.
This change improves actually 2 things for me, first the coherence and
second the "i" is actually easier to reach and therefore more pleasant
to exit quickly from the attachments then via "q".