Voting: allow votes to be loaded out of order if they've been navigated to

[sohkai]

With deep linking, we can now go into a vote's details even if the relevant events haven't been loaded yet. This allows users to navigate into vote details even before the vote appears as a card and would be especially common with deep links.

The only thing that would be initially missing is the vote's title, in the case of non-binding votes.

We would still parse all the events in the bcakground, and the frontend would be updated to show the title or other event-only information when those events were fetched.