Ajaxify the Reindex button.
Change the remote model to support ajax actions with or without refreshing the grid.
Minor changes
Fix back the 'no fetch beyond total' issue that can cause an infinite loop
if conditions are set wrong
After the ajax button has finished its request, we need to re-enable the buttons.
When either ajax or non-ajax buttons are pressed, fade out the grid
when the button is pressed, in addition to disabling the buttons.
Animate the flash that is displayed at the end of the ajax button action