The source project of this merge request has been removed.
Define view mode as mu4e view mode
mu4e-view-mode
is no longer explicitly defined in mu4e-view
on mu's
latest master, seemingly to support views based on Gnus' article-mode
.
Calling mu4e~view-define-mode
fixes the issue, but unfortunately this
seems to be belonging to the private API of mu4e, so probably not the
best solution...