refs #575, using livery completer

* embedded in form
* rectified readOnly / only for selection
* added uper case validator where missing
* selecting airline triggers loading of default livery

src/blackgui/editors/modelmappingform.h

@@ -45,6 +45,9 @@ namespace BlackGui
             //! \copydoc CForm::setReadOnly
             virtual void setReadOnly(bool readOnly) override;
 
+            //! \copydoc CForm::setSelectOnly
+            virtual void setSelectOnly() override;
+
         public slots:
             //! Set model
             void setValue(BlackMisc::Simulation::CAircraftModel &model);