CSS: .show() will no longer override stylesheet css

[timmywil]

When jquery/jquery#2180 lands, it will mean that .show() on an element that is hidden elsewhere (i.e. .hidden { display: none; }) will no longer override that style and show the element. The element will remain hidden. The new recommended workflow will be to first remove the hidden class.

[AurelioDeRosa]

This issue should be put on hold because of the discussion in issue jquery/jquery#2308

[timmywil]

We'll be reverting to the previous behavior.