windows: Fix missing title bar on `prompt library` (#16302)

Closes #16297

It seems that currently we can't draw custom title bar. I have checked
the `title_bar` crate, it seems to be `zed` only.

Before:

![Screenshot 2024-08-16
004350](https://github.com/user-attachments/assets/e11aa0bb-9d3e-47d5-b488-d3b8220158cc)

After:

![Screenshot 2024-08-16
004235](https://github.com/user-attachments/assets/028b4eb2-c878-4ea7-87e3-22817caefa00)


Release Notes:

- N/A