Put voting buttons inside <p> instead of <div>
The addition in !249 (merged) of the 'please log in' button meant that the two buttons ended up in a <div>
rather than a <p>
and the latter is being looked for in init.js when we're loading the focus area app.
We could've changed the parent element that was being looked for, but that'd leave the other button in the DOM (hidden, but still, it seems better to replace both buttons with the Vue app).
Bug: T363231