Fixed issue with a specific string as initial duration

lib/pages/create_recipe_pages/metadata_page.dart

@@ -103,6 +103,7 @@ class _MetadataPageState extends State<MetadataPage> {
               ),
               Padding(padding: EdgeInsets.only(left: 10)),
               CookingDurationButton(
+                heroTag: 1,
                 selectedDuration: _recipeProvider.recipe.prepTime,
                 onDurationChanged: _recipeProvider.updatePrepTime,
               ),
@@ -117,6 +118,7 @@ class _MetadataPageState extends State<MetadataPage> {
               ),
               Padding(padding: EdgeInsets.only(left: 10)),
               CookingDurationButton(
+                heroTag: 2,
                 selectedDuration: _recipeProvider.recipe.cookTime,
                 onDurationChanged: _recipeProvider.updateCookTime,
               ),

lib/widgets/cooking_duration_button.dart

@@ -9,12 +9,15 @@ class CookingDurationButton extends StatelessWidget {
     required this.selectedDuration,
     required this.onDurationChanged,
     this.label = '',
+    required this.heroTag,
   });
 
   final String label;
   final void Function(Duration duration) onDurationChanged;
   final Duration selectedDuration;
 
+  final Object heroTag;
+
   @override
   Widget build(BuildContext context) {
     String text = label;
@@ -22,6 +25,7 @@ class CookingDurationButton extends StatelessWidget {
       text = durationToFormattedString(selectedDuration);
     }
     return FloatingActionButton.extended(
+      heroTag: heroTag,
       onPressed: () => showDialog(
         context: context,
         builder: (context) => _getDurationDialog(

lib/widgets/duration_picker.dart

@@ -26,7 +26,7 @@ class _DurationPickerState extends State<DurationPicker> {
     super.initState();
     if (widget.initialDuration.inMinutes != 0) {
       _timeString =
-          '${widget.initialDuration.inHours}${widget.initialDuration.inMinutes % 60}';
+          '${widget.initialDuration.inHours}${(widget.initialDuration.inMinutes % 60).toString().padLeft(2, '0')}';
     }
   }