Fix for context menu of aircraft view as reported in slack

* reported: https://swift-project.slack.com/archives/G7GD2UP9C/p1533749013000483
* logic moved to view
* removed no longer required code

src/blackmisc/simulation/simulatedaircraft.cpp

@@ -124,6 +124,11 @@ namespace BlackMisc
             return true;
         }
 
+        bool CSimulatedAircraft::toggleFastPositionUpdates()
+        {
+            return this->setFastPositionUpdates(!this->fastPositionUpdates());
+        }
+
         bool CSimulatedAircraft::setRendered(bool rendered)
         {
             if (m_rendered == rendered) { return false; }