Add high z-index to iframe inline styles

[imorente]

When there are any other fixed elements on the page, the iframe remains hidden under them.

[smakinson]

I see the same, here is what I am doing at the moment ( not much testing behind it as I'm just getting started ):

...
<div id="authModal" style="position:absolute; top:0; left: 0; z-index: 99999"></div>
</body>

elsewhere:

netlifyIdentity.init({
   container: '#authModal'
})

[bcomnes]

I belive this was fixed by #95