Allows to display callsign / user / statusmessage as icon in views. refs #122

* Icons
* update of resource file
* update in CValueObject classes callsign / user / statusmessage
* update in list models, data method for returning Pixmap

src/blackmisc/avcallsign.h

@@ -51,6 +51,12 @@ namespace BlackMisc
                 return QVariant::fromValue(*this);
             }
 
+            //! \copydoc CValueObject::toIcon()
+            virtual const QPixmap &toIcon() const override
+            {
+                return CCallsign::convertToIcon(*this);
+            }
+
             /*!
              * \brief Is empty?
              * \return
@@ -168,6 +174,9 @@ namespace BlackMisc
              */
             static QString unifyCallsign(const QString &callsign);
 
+            //! \representing icon
+            static const QPixmap &convertToIcon(const CCallsign &callsign);
+
         private:
             QString m_callsignAsSet;
             QString m_callsign;