This page demonstrates tweaking common options provided by OnDemandGrid.
The grids on this page use an extension of dojo/store/Memory
which delays the response from the query method, in order to
better illustrate the differences.
This grid will remove rows once they are over 500 pixels away from the viewport.
This grid will never remove rows, as farOffRemoval has been
set to a value higher than the total height of the results. It also has
minRowsPerPage set to 50 (double the default value), which
will result in more items queried (and rows rendered) at a time.