Some work on the JavaScript for the datagrid pages regressed the ability

for the datagrid to be bound to viewport edges. We had code that would

update the size properly, but this was removed as the code was reworked.
This change brings back the resize logic during datagrid setup.

Added some temporary code for letting me trigger a dashboard reload.

Verified that with this fix, the resulting size was correct in all

pages using the dashboard.
Unit tests pass.