Improve dates in the reports

lib/ui/reports/reports_screen.dart

@@ -15,6 +15,7 @@ import 'package:invoiceninja_flutter/redux/app/app_state.dart';
 import 'package:invoiceninja_flutter/redux/dashboard/dashboard_actions.dart';
 import 'package:invoiceninja_flutter/redux/reports/reports_actions.dart';
 import 'package:invoiceninja_flutter/redux/reports/reports_state.dart';
+import 'package:invoiceninja_flutter/redux/ui/pref_reducer.dart';
 import 'package:invoiceninja_flutter/redux/ui/pref_state.dart';
 import 'package:invoiceninja_flutter/ui/app/actions_menu_button.dart';
 import 'package:invoiceninja_flutter/ui/app/app_border.dart';
@@ -201,16 +202,32 @@ class ReportsScreen extends StatelessWidget {
           ReportColumnType.dateTime,
         ].contains(getReportColumnType(column, context)));
     final dateField = filterColumns.isNotEmpty ? filterColumns.first : null;
-
-    print(
-        '## dateField: $dateField, filters: $filterColumns, dates: $dateColumns');
+    final dateRange = (reportState.filters[dateField] ?? '').isNotEmpty
+        ? DateRange.valueOf(reportState.filters[dateField])
+        : null;
 
     final dateChildren = [
       AppDropdownButton<String>(
           labelText: localization.date,
           value: dateField,
+          showBlank: true,
           onChanged: (dynamic value) {
-            //
+            viewModel.onReportFiltersChanged(
+              context,
+              reportState.filters.rebuild((b) => b
+                ..addAll(
+                  (value ?? '').isEmpty
+                      ? {filterColumns.first: ''}
+                      : {
+                          value: (reportState.filters[value] ?? '').isNotEmpty
+                              ? reportState.filters[value]
+                              : DateRange.thisQuarter.toString(),
+                          if (filterColumns.isNotEmpty &&
+                              filterColumns.first != value)
+                            filterColumns.first: ''
+                        },
+                )),
+            );
           },
           items: dateColumns
               .map((column) => DropdownMenuItem<String>(
@@ -224,9 +241,7 @@ class ReportsScreen extends StatelessWidget {
         labelText: localization.range,
         showBlank: true,
         blankValue: null,
-        value: (reportState.filters[dateField] ?? '').isNotEmpty
-            ? DateRange.valueOf(reportState.filters[dateField])
-            : null,
+        value: dateRange,
         onChanged: (dynamic value) {
           viewModel.onReportFiltersChanged(
               context,