[Bug]: Paths with spaces not supported

### Checklist

- [ ] The issue exists after disabling all extensions
- [ ] The issue exists on a clean installation of webui
- [ ] The issue is caused by an extension, but I believe it is caused by a bug in the webui
- [ ] The issue exists in the current version of the webui
- [ ] The issue has not been reported before recently
- [ ] The issue has been reported before but has not been fixed yet

### What happened?

In webui-user.bat, putting in paths like _E:/Stable Diffusion/A1111_ wouldn't work.
That's an old case of spaces not being supported, I'm guessing you're a Linux user but I'm on Windows and haven't seen that issue for very long with any other UI, usually I would just put quotes to fix it, like _"E:/Stable Diffusion/A1111"_.
But not this time. So I had to rename my main folder as 'StableDiffusion', effectively breaking everything inside (all the UIs, symlinks, settings and configs etc), thank you very much.

### Steps to reproduce the problem

Put a space in your path.
Go to webui-user.bat
Paste that path
Execute Run.bat

### What should have happened?

It should have worked.

### What browsers do you use to access the UI ?

_No response_

### Sysinfo

-

### Console logs

```Shell
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```

### Additional information

_No response_

Start by reading webui-user.bat and Run.bat, then reproduce the launch from a Windows path containing spaces such as E:/Stable Diffusion/A1111. Trace how the path is passed between the scripts; done means the webui starts successfully without requiring the installation directory to be renamed.

Written by the indexing model from the issue text.