text: Title: [BUG] dcc.Dropdown width rendering incorrect with Dash 3 rc4
  Body: **Describe your context**
  Please provide us your environment, so we can easily reproduce the issue.
  
  -  replace the result of `pip list | grep dash` below
  ```
  dash                 3.0.0rc4
  dash-core-components 2.0.0
  dash_design_kit      1.14.0
  dash-html-components 2.0.0
  dash-table           5.0.0
  ```
  -  if frontend related, tell us your Browser, Version and OS
  
      - OS: [e.g. iOS] MacOS
      - Browser [e.g. chrome, safari] Chrome & Safari
      - Version [e.g. 22] `Version 134.0.6998.88` Arm64
  
  **Describe the bug**
  
  `dcc.Dropdown` renders squashed with Dash 3, whereas it renders at full-width with Dash 2.x
  
  
  **Expected behavior**
  
  The `dcc.Dropdown` should render the same way between Dash 2.x and Dash 3.x, if there have been no code changes in the app.
  
  **Screenshots**
  
  Dash 3.0
  ![Image](https://github.com/user-attachments/assets/8439ae7b-b623-41a0-9752-96e8cb5e0704)
  
  Dash 2.0
  
  ![Image](https://github.com/user-attachments/assets/9e33b722-4e5c-42a5-a62f-268bf412f7db)
  
  