cursor: update hide timer during config apply

We can't arm the timer during cursor creation since the config may not
be ready yet. Instead arm the timer while applying the input
configuration, by this time the configuration has been parsed and we can
arm the hide timer.

Fixes #5686

sway/input/cursor.c

@@ -1041,8 +1041,6 @@ struct sway_cursor *sway_cursor_create(struct sway_seat *seat) {
 
 	cursor->hide_source = wl_event_loop_add_timer(server.wl_event_loop,
 			hide_notify, cursor);
-	wl_event_source_timer_update(
-			cursor->hide_source, cursor_get_timeout(cursor));
 
 	wl_list_init(&cursor->image_surface_destroy.link);
 	cursor->image_surface_destroy.notify = handle_image_surface_destroy;

sway/input/seat.c

@@ -722,6 +722,8 @@ static void seat_configure_pointer(struct sway_seat *seat,
 	wlr_cursor_attach_input_device(seat->cursor->cursor,
 		sway_device->input_device->wlr_device);
 	seat_apply_input_config(seat, sway_device);
+	wl_event_source_timer_update(
+			seat->cursor->hide_source, cursor_get_timeout(seat->cursor));
 }
 
 static void seat_configure_keyboard(struct sway_seat *seat,