Currently we don't do anything special for the `revert` and `revert-layer` keywords. These values will appear at the value that is currently applied to the page, even though technically a previous declaration (either in another origin or layer) is now being applied to the page. We should remove the strikethrough on the value that is actually being used, and provide some sort of jump-to link (or similar) to move from the `revert` or `revert-layer` keyword to the value that will be applied.
<rdar://problem/87119943>