If you look at my previous post
there's a fuller explanation.
Permissions have been a constant irresolvable problem and the result has always been that I couldn't see the changes I've made until I corrected permissions.
Something I had to do on almost every occasion. The theme was always visible in the theme editing window and I could choose to edit it again.
This time however I saved and it just disappeared. There was no evidence of it having ever existed - temp folder or anywhere.
And not to flog a dead horse but the editing interface leaves a lot to be desired. And I know I've used this word too many times but it is obtuse. It's almost impossible to deduce what the result will be for any choice made there. And it's way too restrictive. In PS3 things weren't great but they were much easier. I could get into the css and tweak things. I was hoping that that would be better in PS4 and it is much much worse. I have no idea how to do that in PS4.
Regarding our previous exchange, the code seems to be doing exactly what I needed and is pulling in the selected list as expected.
I really could use some more direct help regarding a dynamic link back from each in the resulting list to its productDetail if such a thing is doable.
Thanks again Ray