Don't show type constructors / selectors and class members of the result for using queries
For instance, searching for using Expression in clean-compiler yields lots of constructors of that type. They are already mentioned in the first result (the type definition itself), so they can be omitted. The same goes for selectors and class members.
However, constructors (selectors, class members) of other types (classes) should be included (in this case e.g.
CP_SymbArgAndExpression). It may be more useful to show the entire type (class) definition in this case (especially when it has multiple constructors using the searched thing).