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/date_picker_btn.dart

@@ -0,0 +1,36 @@
+import 'package:flutter/material.dart';
+
+class DatePickerBtn extends StatelessWidget {
+  final String leadingString;
+  final DateTime pickedDate;
+  final void Function(DateTime) onDatePicked;
+
+  DatePickerBtn({
+    @required this.leadingString,
+    @required this.pickedDate,
+    @required this.onDatePicked,
+  }) : super();
+
+  void _onButtonPressed(BuildContext context) async {
+    onDatePicked(await showDatePicker(
+      context: context,
+      initialDate: pickedDate,
+      firstDate: DateTime(1900),
+      lastDate: DateTime(2100),
+    ));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    ThemeData appTheme = Theme.of(context);
+    return TextButton(
+      onPressed: () => _onButtonPressed(context),
+      child: Text(
+          "$leadingString ${pickedDate.toLocal().toString().split(" ")[0]}"),
+      style: TextButton.styleFrom(
+        primary: appTheme.primaryTextTheme.button.color,
+        backgroundColor: appTheme.accentColor,
+      ),
+    );
+  }
+}