Format widgets don't exist in the node def. This makes converting them
into an input difficult. AddInput is now wrapped on nodes that include
format widgets (only Video Combine) to intercept and add the proper
configuration to the input on conversion. Separately, when workflow data
is loaded that includes a converted format widget, that config data is
properly applied to the already existent input.
Code to forcibly convert input types which do not match has been
removed. This code was a best effort attempt to ease over the transition
from VHS_AUDIO to AUDIO, but did not function as well as hoped and now
causes more issues than it solves. Particular by clobbering a converted
input type to wildcard when connected to a primitive.
Resolves#326
Austin Mroz