Allowing per-html settings

[TwilCynder]

For the stream queue layout, I implemented a way to change the settings (from settings.json) directly in the .html, through a script tag

<script>
  window.config = {
    key: value
  };
  //will override these settings (but only these)
</script>

This allows the user to create copies of an overlay's html file with different settings.
It would be nice if this system was generalized to all layouts (on layouts that emphasize character assets, users could have one html for each asset key instead of having to change it in the settings. Or is there already a way to do that ?)

Anyways, this is mainly a reminder for myself to do it