* Use id() for methods returning a string used to represent
some type of object.
* Use displayName() for strings that are meant to be user
visible.
* Quieten some warnings while touching the files anyway.
* Move Factories to their products in the plugins where that
was not done before.
Reviewed-by: dt
Introduce new QString id() const-API and sort wizards by
[untranslated] category and id. Introduce respective constants.
Rubber-stamped-by: con <qtc-committer@nokia.com>
