Cleanup of non 'rc-' classes in css_spec.cljs

[BnMcGn]

There are a bunch of non-tailwind class names in various *-css-spec structures in the css_spec.cljs file. Some of these are residual bootstrap class names, perhaps with some remaining styling in the re-com.css file. Some are inconsistently named identifiers that should have an rc- on the front. Some, of course, are tailwind classes and should be left alone.

Styling should be taken from re-com.css and converted to tailwind form wherever reasonable.