Keep the repository list scrolled to whatever is currently syncing

[KofTwentyTwo]

When I run Sync All on a big org, the table stays where it is while the activity moves further and further down the list. I end up scrolling by hand to find the repository that's currently being worked on.

Could the list follow the activity, like tailing a log? Scroll so the most recently started or active repository stays in view, stop following when I scroll manually, and offer a small control to resume following.

Tracked as #122.