Mouseover for non-link items

Feature Request

The https://github.com/philc/vimium/wiki/Tips-and-Tricks#hovering-over-links-using-linkhints LinkHints.activateMode action=hover is excellent. However, some websites have non-link elements with mouseover event handlers, which means that this command can't see those mouseovers. It would be nice if there was a way to extend the link hints to these non-link elements with mouseover event listeners.

To Reproduce

Have a non-link HTML element with an event listener for "mouseover", and have a shortcut for LinkHints.activateMode action=hover.

For a concrete example, consider this StackOverflow answer's second snippet: https://stackoverflow.com/a/53491393

var text = document.getElementById('text')

text.addEventListener("mouseout", function() {
  text.textContent = "cat"
})

text.addEventListener("mouseover", function() {
  text.textContent = "dog"
})

Given the HTML:

<p id="text">
  cat
</p>

Running the code snippet and clicking in the snippet, using the keyboard shortcut to hover does not show a link hint on this element.

Note that the browser inspect tools show that this <p id="text"> element has event listeners for mouseout and mouseover.

Browser and Vimium version

• Browser: Firefox 94.0
• Vimium version: 1.67

Start by tracing LinkHints.activateMode action=hover and reproduce the provided StackOverflow example in Firefox. Compare how existing link hints identify targets with the non-link element's mouseover listener; done means the non-link element receives a usable hint and triggers its mouseover behavior.