Ex 1: User selects constraints from the list => right click => select "select elements" from the contextual menu => The elements (edges,vertex) involved in the constraint(s) are selected.
Ex 2: User selects (a) constraint(s) => Clicks button in toolbar (if included by the user) => The elements (edges,vertex) involved in the constraint(s) are selected.
Intended as visual aid to see which elements are being affected by a constraint.
Requested by Jim on thread:
http://forum.freecadweb.org/viewtopic.php?f=19&t=6875&start=10
Solving another Mantis ticket I can not find now.
