Allow to select COM frequencies from ATC view (context menu)

* added functions in component to select COM frequencies
* changed views to contain ObjectType in template
* function to obtain selected objects in view base class

src/blackcore/context_ownaircraft.cpp

@@ -20,7 +20,7 @@ namespace BlackCore
         case CRuntimeConfig::Remote:
             return new BlackCore::CContextOwnAircraftProxy(BlackCore::CDBusServer::ServiceName, conn, mode, parent);
         default:
-            qFatal("Always initialize an ownaircraft context");
+            qFatal("Always initialize an ownAircraft context");
             return nullptr;
         }
     }