Two things about this:

1) the CSS class/id naming convention in Prometheus is to use `under_scores`, not `camelCase` (exceptions with dashes instead of underscores for jquery-ui and bootstrap class names). Please name this `graph_stacked` instead.

2) IDs have to be unique within a page, but there can be many of these elements (multiple graphs per page), so this ID will not be unique. Make it a class instead.

HOWEVER, how about removing this id/class altogether and changing the CSS rule so that they apply to all labels within the `config` class? Like:

    .config label {
      display: inline;
    }

Similar comments apply to other newly introduced ID fields.