Scroll the page to make selected links visible

[mildmojo]

If you select a link that's off-screen, the page doesn't move and you can't see what you've highlighted.

• Make sure selected link is visible.
• Animate scroll to link.
• Maybe use secondary gamepad axis (right stick) to scroll page?

[mildmojo]

Added scroll-to-links to ensure visibility in 33399ff.