fix date picker not showing right timezone

src/components/DatePicker/DatePicker.vue

@@ -199,6 +199,13 @@ export default {
     },
 
     toValue(date) {
+      // toISOString is buggy and reduces the day by one
+      // this is because it considers the UTC timestmap
+      // in order to curcumvent that we need to use luxon/moment
+      // but that refactor could take some time, so fixing the time differnece
+      // ass suggested in this answer.
+      // https://stackoverflow.com/a/16084846/3541205
+      date.setHours(0, -date.getTimezoneOffset(), 0, 0);
       return date.toISOString().slice(0, 10);
     },