Close Preview and remain on detail when back selected

Hm.  I hadn't thought of typing in the url to change it.  As it turns out, your suspicion is correct.  In that case, the page change is prevented...
I haven't found any way to determine a difference.  And this is the only way I have found to get the desired behavior on back.
I guess it is back to the drawing board unless we can live with the consequences.