Refactor

[yesmeck]

This a huge refactor.

Expand rows only re-render expanded rows now.

Before:

After:

[coveralls]

Coverage decreased (-3.06%) to 95.413% when pulling 28d72ad on next into 20a83c6 on master.

[coveralls]

Coverage decreased (-3.06%) to 95.413% when pulling 6cd1abd on next into 20a83c6 on master.

[coveralls]

Coverage decreased (-0.7%) to 97.798% when pulling db580bc on next into 20a83c6 on master.

[coveralls]

Coverage decreased (-0.7%) to 97.798% when pulling 36b89a1 on next into 20a83c6 on master.