allow for HTML formatted cell contents

If you have complex objects or images and want to show then in a smartTable you can use a formatFunction, however the formatted HTML is shown as plain tekst i.s.o. the rendered HTML. Changing element.text to element.html allows you to see the rendered HTML.

example: the cell data is a image URL and the formatFunction returns <img src="celldata"> we can now see the images in the table.