The ability to update (edit contents of) an object was
never present in the previous Swift UI. It was
explicitly blocked due to code in the swift_upload_object()
function, which has been removed in this patch. To
replace that "upload would replace existing contents"
check, this patch implements a client-side check to warn
the user if the upload would do so.
Partially-Implements: blueprint swift-ui-functionality
Change-Id: I9fb57dda59322907f0661372f9ee223551ff8a6e