Remove "g mode".
Remove "g mode".

When seeing a g in motion mode, just ask for an extra key.
Could potentially combine the two motion table into one with
a string key, but this is fine for now.

n.b. This breaks the tests, because editor_send_keys doesn't play well
with the new input scheme -- it just passes the synthetic events it
creates to editor_handle_key_press, so code calling editor_waitkey won't
see them (it will block instead).

Will need to either adjust editor_send_keys, or write tests some other
way (e.g. control app with an external process).

isbadawi/badavi