Logo is not found in preview, when ` --virtual-dir` is used

I'm previewing with `--virtual-dir=Cake.7zip` set and I have setting `Logo=/assets/logo.png`.

The logo is rendered as:

```html
<img id="logo" src="/assets/Logo.png" alt="Documentation">
```

Which results in 404/NotFound for the logo.
Manually changing the `src` to `/Cake.7zip/assets/Logo.png` does result in the logo being visible.