More in line with default vim spell mappings, and should not interfere
with anything due to its leader prefixing.
Added <leader>z to quickly fix spelling error cursor is over.
Mimicks vifm d for grabbing and cutting, D for true deletion. Works well
to delete a line (e.g. left-over empty) while still keeping last
selection in yank-register. Starts a d-motion, so it can be used with
all motions.