#73 made the role visible in disabled ContactEditor

When the ContactEditor is disabled, all components become disabled or
are replaced by better fitting components. This now also true for the
role components. Whereas in the ContactRenderer the role components are
not visible.
 #73 added an edit-button to ContactInformationVisualPanel

A edit button was added to ContactInformationVisualPanel, with this
button the embedded ContactEditor can be enabled such that the selected
contact can be edited in the wizard.
Merge branch 'feature/73-edit-button-in-contact-panel' into dev