Listen for planner events

lib/www/server/ws/index.js

@@ -7,6 +7,7 @@ function start (server, pingInterval=30000) {
 	const channels = [
 		"realtime", "event", "project",
 		"preplot_lines", "preplot_points",
+		"planned_lines",
 		"raw_lines", "raw_shots",
 		"final_lines", "final_shots"
 	];