Damage container on focus

sway/input/seat.c

@@ -530,6 +530,7 @@ void seat_set_focus_warp(struct sway_seat *seat,
 		if (container->type == C_VIEW) {
 			seat_send_focus(seat, container);
 		}
+		container_damage_whole(container);
 	}
 
 	// clean up unfocused empty workspace on new output
@@ -575,6 +576,10 @@ void seat_set_focus_warp(struct sway_seat *seat,
 		}
 	}
 
+	if (last_focus) {
+		container_damage_whole(last_focus);
+	}
+
 	if (last_focus && last_focus->type == C_VIEW &&
 			!input_manager_has_focus(seat->input, last_focus)) {
 		struct sway_view *view = last_focus->sway_view;