To better support multiple key macros in a row.

Rather than needing to send +key.a, +key.b, -key.a, -key.b, +key.1, +key.2, etc. specifying up and down for each, you can define the chords more simply:

[[key.a, key.b], [key.1, key.2]]

The macro definition is simpler, and less error prone (see win-edge.py, was pressing control and releasing command).

Also shorthands multiple presses in a row:

[[Keycode.ENTER], [Keycode.ENTER], [Keycode.ENTER]] will press and release enter 3x in a row.

Oops, fixed one copy paste error only to introduce another. Now both are fixed.