Enhance - Convert more messages (#2646)

convert more messages to messages class
skipped dashboard messages due to them relying on $_SESSION['message']
to know if there has already been a change

app/call_broadcast/call_broadcast_stop.php

@@ -52,7 +52,7 @@ else {
 		if ($fp) {
 			$cmd = "sched_del ".$uuid;
 			$result = event_socket_request($fp, 'api '.$cmd);
-			$_SESSION['message'] = htmlentities($result);
+			messages::add(htmlentities($result));
 		}
 	}