"Invalidate" corrupts the selection displayed in chosenbox

If "invalidate()" is called and a chosenbox is inside the area of effect then the selection of the chosenbox becomes invisible. The selection still exists but is not visible anymore. A notify can make the selection visible again if it's called later.

An example of this problem is in zk fiddle: http://zkfiddle.org/sample/2q0lai6/2-Invisible-selection-in-chosenbox