Fixed Simple Problem, that occured after migrating to new version.

Still WIP need to fix more Problems

lib/widgets/buttons/color_picker_btn.dart

@@ -7,7 +7,7 @@ class ColorPickerButton extends StatelessWidget {
   final Color selectedColor;
   final void Function(Color) onColorPicked;
 
-  ColorPickerButton({
+  const ColorPickerButton({super.key, 
     @required this.title,
     @required this.dialogTitle,
     @required this.selectedColor,
@@ -34,13 +34,13 @@ class ColorPickerButton extends StatelessWidget {
           },
         );
       },
-      child: Text(title),
       style: TextButton.styleFrom(
         primary: useBrightBackground(selectedColor)
-            ? appTheme.primaryTextTheme.button.color
-            : appTheme.textTheme.button.color,
+            ? appTheme.primaryTextTheme.labelLarge.color
+            : appTheme.textTheme.labelLarge.color,
         backgroundColor: selectedColor,
       ),
+      child: Text(title),
     );
   }
 }

lib/widgets/buttons/create_progress_button.dart

@@ -4,15 +4,17 @@ import 'package:time_progress_tracker/screens/progress_creation_screen.dart';
 class CreateProgressButton extends StatelessWidget {
   final String _heroTag = "createProgressBTN";
 
+  const CreateProgressButton({super.key});
+
   @override
   Widget build(BuildContext context) {
-    void _onButtonPressed() =>
+    void onButtonPressed() =>
         Navigator.pushNamed(context, ProgressCreationScreen.routeName);
 
     return FloatingActionButton(
       heroTag: _heroTag,
-      child: Icon(Icons.add),
-      onPressed: _onButtonPressed,
+      onPressed: onButtonPressed,
+      child: const Icon(Icons.add),
     );
   }
 }

lib/widgets/buttons/date_picker_btn.dart

@@ -5,11 +5,11 @@ class DatePickerBtn extends StatelessWidget {
   final DateTime pickedDate;
   final void Function(DateTime) onDatePicked;
 
-  DatePickerBtn({
+  const DatePickerBtn({super.key, 
     @required this.leadingString,
     @required this.pickedDate,
     @required this.onDatePicked,
-  }) : super();
+  });
 
   void _onButtonPressed(BuildContext context) async {
     onDatePicked(await showDatePicker(
@@ -25,12 +25,12 @@ class DatePickerBtn extends StatelessWidget {
     ThemeData appTheme = Theme.of(context);
     return TextButton(
       onPressed: () => _onButtonPressed(context),
-      child: Text(
-          "$leadingString ${pickedDate.toLocal().toString().split(" ")[0]}"),
       style: TextButton.styleFrom(
-        primary: appTheme.primaryTextTheme.button.color,
+        primary: appTheme.primaryTextTheme.labelLarge.color,
         backgroundColor: appTheme.accentColor,
       ),
+      child: Text(
+          "$leadingString ${pickedDate.toLocal().toString().split(" ")[0]}"),
     );
   }
 }

lib/widgets/buttons/select_duration_btn.dart

@@ -5,7 +5,8 @@ class SelectDurationBtn extends StatelessWidget {
   final Duration duration;
   final void Function(Duration) updateDuration;
 
-  SelectDurationBtn({
+  const SelectDurationBtn({
+    super.key,
     @required this.duration,
     @required this.updateDuration,
   });
@@ -38,10 +39,10 @@ class SelectDurationBtn extends StatelessWidget {
     int days = duration.inDays - (365 * years) - (30 * months);
     return TextButton(
         onPressed: () => _onButtonPressed(context, appTheme),
-        child: Text("$years Years $months Months $days Days"),
         style: TextButton.styleFrom(
-          primary: appTheme.primaryTextTheme.button.color,
+          primary: appTheme.primaryTextTheme.labelLarge.color,
           backgroundColor: appTheme.accentColor,
-        ));
+        ),
+        child: Text("$years Years $months Months $days Days"));
   }
 }