Layout sketches for versions list

This has dropped off the %0.103 - UX Overhaul milestone due to time, however @crwinfrey's mockups from #749 (closed) are great and at some point in the future should be looked into and implemented:

mentioned in issue #767 (closed)

mentioned in issue #749 (closed)

mentioned in issue #952 (closed)

mentioned in issue #740 (closed)

mentioned in issue #1115 (closed)

marked this issue as related to #1115 (closed)

mentioned in issue #1132 (closed)