v2 * Handle enter motion during pointer lock if pointer focus isn't on the constraint hwnd. * In some cases (sway, when entering the pointer from the top of a floating windowed window, and no windows are layered on top of the window), the enter event is immediately followed by a motion event, which gets handled before the foreground thread gets to re-enable relative motion. The check for relative mode in `pointer_handle_motion` is adjusted slightly.