ce8cc9219f
Refactored the code a little, so all callbacks now receive a `user_data` pointer, which can be anything. As an example, the key pairs from `ACTION_TAP_DANCE_DOUBLE` now use this, and custom, built-in functions. This makes it easier to extend the tap dance functionality, and also simplifies the code a little. Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>