provide warning if config items will not preserve order

If a group of items are enclosed in {}, then that will be a Python set,
which does not preserve order.  To preserve order, the data must be either
a tuple () or list [].
1 job for make-Build-App-act-like-dicts in 26 minutes and 21 seconds (queued for 4 seconds)
Status Job ID Name Coverage
passed #11078630