Umstellung auf UTC Timestamp

lib/content_views/task_list_page.dart

@@ -536,6 +536,7 @@ class _TaskListPageState extends State<TaskListPage> with ProducerMixin {
       finTourMessage.track = Track();
       finTourMessage.track!.time = Util.nowUnixSecondsUtc();
       finTourMessage.track!.pos = FinTaskPos();
+      finTourMessage.track!.pos!.time = Util.toUnixSecondsUtc(position.timestamp);
       finTourMessage.track!.pos!.lat = position.latitude;
       finTourMessage.track!.pos!.long = position.longitude;
     }
@@ -574,7 +575,7 @@ class _TaskListPageState extends State<TaskListPage> with ProducerMixin {
           var message = PicData();
           message.trId = picture.tourId;
           message.num = picture.number;
-          message.time = DateTime.now().millisecondsSinceEpoch;
+          message.time = Util.nowUnixSecondsUtc();
           message.data = picture.data;
 
           sendMessage(