Restart Dart language server makes Dart dev tools duplicated on the status bar #4748

Describe the bug
On the status bar of VSCode, there is a button like {} Dart.
When click the Restart Dart language server on the menu.
The Dart dev tools item will be duplicated.

To Reproduce
Steps to reproduce the behavior:

1. Open VSCode with Flutter app project.
2. Move the mouse pointer to the {} Dart on the status bar.
3. A floating menu is shown.
4. Click restart button on the Dart Language Server Line.
5. The Dart Dev Tools Line will be Duplicated.

Expected behavior
The Dart Dev Tools Line should not be duplicated.

Screenshots

Please complete the following information:

• Operating System and version: macOS 13.4.1 (c)
• VS Code version: 1.82.2
• Dart extension version: v3.72.2
• Dart/Flutter SDK version: 3.13.4
• Target device (if the issue relates to Flutter debugging): N/A