On lists like Special:Contributions (and perhaps others) a contribution should be highlighted (or accessible for highlightng) if still unchanged.

Currently at the end of such lines a uctop text equipped with a class="mw-uctop" is displayed.

The CSS sibling rules do not permit to evaluate .mw-uctop property and give the whole item e.g. a green background; only the uctop and later elements like revert link can be accessed with pure CSS. A JavaScript gadget would be required to mark the entire parent.

On the same list items containing a uctop right now the <li> element shall be equipped with class="mw-uctop" and leave it to projects and users how to decorate contributions if not changed yet.