Delegate function is not executed on non-active cases in case-control

[idbr]

Use case: we're using the delegate method to inform a TinyMCE-editor wrapped in a kauri control about dom moves, so it is initialized correctly in a dialog box.
As an extra, the aforementioned control is a case member of a case-control. When this case member isn't the default one, the editor is not reset, because of the delegate function not being triggered.

Test attached.

[mpo]

In [1873]:

fixes #449. Thanx to Ives for spotting and the elegant testcase.
By introducing a third argument (boolean) to eachChild() method we can specify looping needs to pass also in-active children. This is needed for the special behavior of the case control (who has only one of its value-control children active at any given time)