When frozenBottom set to true, can't add new rows #73
Description
The bug is this: use your example: http://jlynch7.github.io/SlickGrid/examples/example-frozen-columns-and-rows.html. Set frozenBottom:true in the options. Then either add a row or insert a row. You will see a gap appear between the frozen rows and the overflow rows, and one row of data will disappear. The more rows you add, the more disappear. They are in the DOM, just not visible.
This is not a show stopper, but we do have a use case that requires adding rows to a frozenBottom=true Slick Grid. Thanks for all the excellent work you have done on this grid.