Distinguish preferred flowables and contexts in flow description.

[bl-young]

The description "Preferred flow" or "Not a preferred flow" confuses users because it does not make clear that some flows are preferred but are just using a more generic unpreferred context.

fedelemflowlist/fedelemflowlist/jsonld.py

Lines 162 to 166 in d087905

	preferred = row.get("Preferred", 0)
	if preferred == 1 or preferred == "1":
	description += " Preferred flow."
	else:
	description += " Not a preferred flow."

When writing the flows, only the preferred state is maintained, not the distinction between preferred flowable and preferred context; these items would need to be tracked separately.