Updated MVCGrid.Js to fix a bug
Updated MVCGrid.Js to fix a bug

I fixed a logic issue which resulted in the loading dialog staying on
the screen, even after loading had completed.

joeharrison714/MVCGrid.Net,gkomorowska/MVCGrid.Net-with-Post,gkomorowska/MVCGrid.Net-with-Post,joeharrison714/MVCGrid.Net