edit-time: update min & max time

lib/ui/fading_app_bar.dart

@@ -244,8 +244,8 @@ class FadingAppBarState extends State<FadingAppBar> {
 
   void _showDateTimePicker(File file) async {
     final dateResult = await DatePicker.showDatePicker(context,
-        minTime: DateTime(1800, 1, 1),
-        maxTime: DateTime.now().add(Duration(days: 1)),
+        minTime: DateTime(1, 1, 1),
+        maxTime: DateTime.now(),
         currentTime: DateTime.fromMicrosecondsSinceEpoch(file.creationTime),
         locale: LocaleType.en);
     if (dateResult == null) {