fix: Reset preview when reset form field

Author: deandreamatias

example/lib/main.dart

@@ -85,6 +85,15 @@ class MyHomePageState extends State<MyHomePage> {
                           () => _useCustomFileViewer = !_useCustomFileViewer);
                     },
                   ),
+                  const Spacer(),
+                  ElevatedButton(
+                    child: const Text('Reset'),
+                    onPressed: () {
+                      setState(
+                        () => _formKey.currentState!.reset(),
+                      );
+                    },
+                  ),
                 ],
               ),
             ],

lib/src/form_builder_file_picker.dart

@@ -248,7 +248,6 @@ class _FormBuilderFilePickerState
         final itemSize =
             (constraints.biggest.width - (count * spacing)) / count;
         return Wrap(
-          // scrollDirection: Axis.horizontal,
           alignment: WrapAlignment.start,
           runAlignment: WrapAlignment.start,
           runSpacing: 10,
@@ -352,4 +351,10 @@ class _FormBuilderFilePickerState
         return Icons.insert_drive_file;
     }
   }
+
+  @override
+  void reset() {
+    super.reset();
+    setState(() => _files = widget.initialValue ?? []);
+  }
 }