Scroll item into view

[wattsbn]

It would be nice to have a function (scrollIntoView for example) to ensure that an item is visible. I am aware of #183 and #571, however both always scroll the element to the top of the viewport. (http://plnkr.co/edit/oyIlX9)

I would like to do the minimum amount of scrolling to make the element visible.
So if the element is already visible, then do nothing.
If the element is below the viewport, then scroll until its the last element in the viewport.

[cguillemette]

I agree with Watts. This is much needed.