Since commit 5c8a749cfa ("binds: display active keybinds in a dialog
box") the ? key is bound to `:help keys` in the global section which
applies to all binding contexts. Pressing ? while editing any email
headers in the compose window (when the editor is not selected) displays
the active bindings menu.
Add $noinherit=true in the [compose] context to allow typing any
character. Copy the bindings for next-tab and prev-tab so that users can
still change tabs while editing headers.
Cc: Akspecs <akspecs@gmail.com>
Signed-off-by: Robin Jarry <robin@jarry.cc>