Support for "per theme" icon URLs via dependency handling.
Given that we are able to intercept requests for images in CSS – would it be possible to generate a “per theme” CSS file. Some mechanism to override or add a theme suffix to all image urls – so that the DependencyHandler could check for the existence of a theme override for the image and fallback if not present during the generate of the CSS. So a different checksum would be generated for each theme version of the CSS if it contained different images.
This would allow an icon set per theme - even though the icons are currently stored locally to each component.