removed done todos and back to sandbox version

lib/addevent.dart

-import 'dart:convert';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_datetime_picker/flutter_datetime_picker.dart';
@@ -527,6 +526,3 @@ class _AddEventPageState extends State<AddEvent>  {
     }
   }
 }
-
-//TODO: update shared preferences current event on adding event!
-//TODO: long urn string is not displayed correctly!
\ No newline at end of file

lib/sensorconnector.dart

@@ -5,8 +5,8 @@ import 'package:http/http.dart' as http;
 import 'datamodel.dart';
 
 class SensorConnector {
-  //final String baseUrl = 'https://sandbox.sensor.awi.de/rest/';
-  final String baseUrl = 'https://sensor.awi.de/rest/';
+  final String baseUrl = 'https://sandbox.sensor.awi.de/rest/';
+  //final String baseUrl = 'https://sensor.awi.de/rest/';
   final String loginUrl = 'sensors/contacts/login';
   final String collectionsUrl = 'sensors/collections/getAllCollections?pointInTime=2018-07-03T12%3A30%3A55.389Z';
   final String eventTypesUrl = 'sensors/events/getAllEventTypes';

lib/viewevents.dart

@@ -292,4 +292,3 @@ class _ViewEvents extends State<ViewEvents> {
   }
 }
 //TODO: allow editing fields here.
-//TODO: show only pending events.
\ No newline at end of file