HOTFEATURE: Admin Product Search Improvements

* Created new functions for admin product search page (sp_ProductSearchWithFiltersAndPaging, GetProductSearchWithFiltersAndPaging), modeled from the originals.

* Added paging to product search page.

* Added update panel to provide indicator for work being performed on post backs.

* Moved product results to be first grid shown (not sure why we were showing manufacturer and category before products on the "product search" page).

* Added page level options to show hide/include category and manufacturer grids (by default not checked).

* Created a separate query builder for product list page.

* Added callback function on searchProduct.aspx that is now called from deleteProduct.aspx to rebind the page, versus us just automatically doing it every time. (this was causing issues with paging).