Merge branch '33-calendar_date_selection' into 'master'

calendar date selection: the selected date is now the initial date

Closes #33

See merge request !19

car_app/lib/view/calendar_event.dart

@@ -78,7 +78,7 @@ class _CalendarEventViewState extends State<CalendarEventView> {
       context: context,
       firstDate: DateTime(1999, 01, 01),
       lastDate: DateTime(2100, 12, 31),
-      currentDate: initial,
+      initialDate: initial,
       initialEntryMode: DatePickerEntryMode.calendarOnly,
       cancelText: "Cancel",
       confirmText: "Confirm",