Make the header dropdown button as a default

example/lib/presentation/quill/my_quill_toolbar.dart

@@ -201,7 +201,6 @@ class MyQuillToolbar extends StatelessWidget {
           configurations: QuillSimpleToolbarConfigurations(
             controller: controller,
             showAlignmentButtons: true,
-            headerStyleType: HeaderStyleType.dropdown,
             buttonOptions: QuillSimpleToolbarButtonOptions(
               base: QuillToolbarBaseButtonOptions(
                 // Request editor focus when any button is pressed

lib/src/models/config/toolbar/simple_toolbar_configurations.dart

@@ -52,14 +52,14 @@ enum LinkStyleType {
 }
 
 enum HeaderStyleType {
-  /// Defines the original [QuillToolbarSelectHeaderStyleButtons].
+  /// Defines the original [QuillToolbarSelectHeaderStyleDropdownButton].
   original,
 
-  /// Defines the alternative [QuillToolbarSelectHeaderStyleDropdownButton].
+  /// Defines the alternative [QuillToolbarSelectHeaderStyleButtons].
-  dropdown;
+  buttons;
 
   bool get isOriginal => this == HeaderStyleType.original;
-  bool get isDropdown => this == HeaderStyleType.dropdown;
+  bool get isButtons => this == HeaderStyleType.buttons;
 }
 
 /// The configurations for the toolbar widget of flutter quill

lib/src/widgets/toolbar/simple_toolbar.dart

@@ -197,16 +197,16 @@ class QuillSimpleToolbar extends StatelessWidget
           ),
         if (configurations.showHeaderStyle) ...[
           if (configurations.headerStyleType.isOriginal)
-            QuillToolbarSelectHeaderStyleButtons(
-              controller: globalController,
-              options:
-                  toolbarConfigurations.buttonOptions.selectHeaderStyleButtons,
-            )
-          else
             QuillToolbarSelectHeaderStyleDropdownButton(
               controller: globalController,
               options: toolbarConfigurations
                   .buttonOptions.selectHeaderStyleDropdownButton,
+            )
+          else
+            QuillToolbarSelectHeaderStyleButtons(
+              controller: globalController,
+              options:
+                  toolbarConfigurations.buttonOptions.selectHeaderStyleButtons,
             ),
         ],
         if (configurations.showDividers &&