show the actual validation error message when 1 error on a Properties view rather than "1 error detected"

when editing the Properties fields on a node (e.g. typing a non-numeric into a number field like closeCorrelationKeyOnCompletion or completionSize on Aggregate - the error message on the title section of the Properties view shows "1 error detected" rather than showing the actual error.

It would be nicer to just show the one error message there