fixes to clear stale content off the page when the datasets selectors are changed.
fixes to clear stale content off the page when the datasets selectors are changed.

XDATA-Year-3/EntityAlignLarge,curtislisle/EntityAlignLarge,XDATA-Year-3/EntityAlignLarge,XDATA-Year-3/EntityAlignLarge,curtislisle/EntityAlignLarge,XDATA-Year-3/EntityAlignLarge,curtislisle/EntityAlignLarge,curtislisle/EntityAlignLarge