Customize dav root

I have a dav.html page on a root / of my site but I wish to browse /dav/ folder.
Can we make it configurable?
For example I can put a data attr to `<body>` like:
`<body data-dav-root="/dav/">`

I see that a State class receives in a constructor the
window.location and use it to teremine a path.
