Virtualized scrolling seems to lag

When scrolling large lists that use virtualization, the position in the scroll area lags behind reality. Also, the individual rows in the list show up blank, and then blink in to existence.

We should try some of the other virtualization libraries that exist to see if they have the same issues. There may also be some tweaking we can do to the current virtualization library that alleviates these issues.

If all else fails, we can move to paging instead.