Feature/code cleanup (#9)

* Implemented hasSettingsLoaded reducer
* Added Padding to Progress List View
* Created Settings and Time Progress List Store Connector
* Rewritten Home Active Tab
* Fixed missing onTap in Progress List Tile
* Started using new Store Connectors in Inactive and Settings Tab
* Created Time Progress Store Connector
* Rewritten ProgressDetailScreen with new Store Connectors
* Rewritten DatePickerBtn with TextButton
* Deleted unused widget
* Changed Foreground Color behaviour in ColorPicker BTN
* Created Select Duration Button
* Rewritten Duration Setting Widget
* Updated Version Number

Signed-off-by: Andreas Fahrecker <AndreasFahrecker@gmail.com>

lib/widgets/buttons/select_duration_btn.dart

@@ -0,0 +1,47 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_picker/flutter_picker.dart';
+
+class SelectDurationBtn extends StatelessWidget {
+  final Duration duration;
+  final void Function(Duration) updateDuration;
+
+  SelectDurationBtn({
+    @required this.duration,
+    @required this.updateDuration,
+  });
+
+  void _onPickerConfirm(Picker picker, List<int> values) {
+    int years = values[0], months = values[1], days = values[2];
+    days = (years * 365) + (months * 31) + days;
+    Duration newDuration = Duration(days: days);
+    updateDuration(newDuration);
+  }
+
+  void _onButtonPressed(BuildContext context, ThemeData appTheme) => Picker(
+          adapter: NumberPickerAdapter(data: [
+            const NumberPickerColumn(begin: 0, end: 999, suffix: Text(" Y")),
+            const NumberPickerColumn(begin: 0, end: 11, suffix: Text(" M")),
+            const NumberPickerColumn(begin: 0, end: 31, suffix: Text(" D")),
+          ]),
+          hideHeader: false,
+          title: const Text("Default Duration"),
+          selectedTextStyle: TextStyle(color: appTheme.accentColor),
+          onConfirm: _onPickerConfirm)
+      .showModal(context);
+
+  @override
+  Widget build(BuildContext context) {
+    ThemeData appTheme = Theme.of(context);
+
+    int years = duration.inDays ~/ 365;
+    int months = (duration.inDays - (365 * years)) ~/ 30;
+    int days = duration.inDays - (365 * years) - (30 * months);
+    return TextButton(
+        onPressed: () => _onButtonPressed(context, appTheme),
+        child: Text("$years Years $months Months $days Days"),
+        style: TextButton.styleFrom(
+          primary: appTheme.primaryTextTheme.button.color,
+          backgroundColor: appTheme.accentColor,
+        ));
+  }
+}