Is it possible to automate highlighting every verse in a passage list?
Not easily.
You can create a Visual Filter based on a Passage List but you would still need to choose words to search for so the Visual Filter would cause the highlights to happen.
Suggest converting Passage List to a list of Milestones for Visual Filter. Compact display of Passage List shows Bible Abbreviation for Milestone.
For example, Philippians 4:4 => {Milestone <Php4.4>}
Milestone search finds entire verse in Bibles (and sections in Commentaries) without needing to choose words.
Keep Smiling [:)]
Good point - thanks KS4J