fix: improve when show dropdown disabled hint

Author: deandreamatias

lib/src/fields/form_builder_dropdown.dart

@@ -1,4 +1,3 @@
-import 'package:collection/collection.dart' show IterableExtension;
 import 'package:flutter/material.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
 
@@ -262,12 +261,11 @@ class FormBuilderDropdown<T> extends FormBuilderFieldDecoration<T> {
               value: hasValue ? field.value : null,
               style: style,
               isDense: isDense,
-              disabledHint: field.value != null
-                  ? (items
-                          .firstWhereOrNull((dropDownItem) =>
-                              dropDownItem.value == field.value)
-                          ?.child ??
-                      Text(field.value.toString()))
+              disabledHint: hasValue
+                  ? items
+                      .firstWhere(
+                          (dropDownItem) => dropDownItem.value == field.value)
+                      .child
                   : disabledHint,
               elevation: elevation,
               iconSize: iconSize,

pubspec.lock

@@ -34,7 +34,7 @@ packages:
     source: hosted
     version: "1.1.1"
   collection:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: collection
       sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"

pubspec.yaml

@@ -15,7 +15,6 @@ dependencies:
   flutter:
     sdk: flutter
   intl: ^0.18.0
-  collection: ^1.17.1
 
 dev_dependencies:
   flutter_lints: ^2.0.1