feat: optimize the find and replace logic (#510)

example/lib/pages/desktop_editor.dart

@@ -39,6 +39,14 @@ class _DesktopEditorState extends State<DesktopEditor> {
     commandShortcuts = _buildCommandShortcuts();
   }
 
+  @override
+  void dispose() {
+    editorScrollController.dispose();
+    editorState.dispose();
+
+    super.dispose();
+  }
+
   @override
   void reassemble() {
     super.reassemble();
@@ -174,6 +182,7 @@ class _DesktopEditorState extends State<DesktopEditor> {
           close: 'Close',
           replace: 'Replace',
           replaceAll: 'Replace all',
+          noResult: 'No result',
         ),
       ),
     ];