Fix active flag.

contrib/aura-player/src/TrackService.svelte

@@ -52,10 +52,11 @@
 	function isActive(item) {
 		if (item.track.duration != null && parseInt(item.track.duration) > 0) {
 			let startDate = new Date(item.track_start);
-			let endDate = new Date(startDate.getTime() + item.track.duration*1000);
+			let endDate = new Date(startDate.getTime());
+			endDate.setSeconds(endDate.getSeconds() + parseInt(item.track.duration));
 			let now = new Date();
 
-			if (startDate < now < endDate) {
+			if (startDate < now && now < endDate) {
 				return "active-track";
 			} else {
 				return "";