Tweak in icon / callsign

* conversion to Icon in callsign
* toQIcon function

src/blackmisc/icon.h

@@ -14,6 +14,7 @@
 
 #include "icons.h"
 #include "pqangle.h"
+#include <QIcon>
 
 namespace BlackMisc
 {
@@ -38,6 +39,9 @@ namespace BlackMisc
         //! Corresponding pixmap
         QPixmap toPixmap() const;
 
+        //! A QIcon
+        QIcon toQIcon() const;
+
         //! Icon set?
         bool isSet() const { return (this->m_index != static_cast<int>(CIcons::NotSet));}