add refinement of port directly in component view
In component view, when input/output port is selected and right button
of mouse is clicked, there is a “add to refinement” selection in the
popup view.
After you choose the selection, a dialog will appear. In this dialog,
new refinement(include mapping refinement, value refinement and
refinement group) can be added when “added” button was clicked the
button on the left.
Finally select the source(default) or target radio in the bottom of the
dialog and click “OK” button, a new direct mapping refinement would
added.
(from redmine: issue id 1668, created on 2013-09-02, closed on 2013-09-16)