pub fn default_binding(button: ButtonId) -> ActionExpand description
Sensible defaults for a fresh device so the panel isn’t empty on first run.
Thumbwheel / GestureButton defaults match what Logi Options+ ships for
MX-line devices: thumb wheel click → App Exposé, gesture button →
Mission Control. The thumb wheel isn’t captured yet; the gesture button is
(per-direction, see default_gesture_binding). The bindings persist
regardless so the user only configures once.
GestureButton’s entry here is the legacy single-binding placeholder;
the per-direction sub-bindings live in default_gesture_binding and
are what the UI now edits.