Misc. imorvements as discussed in RW/KB worksho

* preparation for a context menu to send text messages from ATC/aircraft view
* preparation for context menu for fast pos. updates
* reverse ICAO lookup at login screen
* display fast updates / parts in GUI
* moved max- aircraft into settings
* made serverselection own component

src/blackgui/components/aircraftcomponent.h

@@ -80,7 +80,7 @@ namespace BlackGui
             QScopedPointer<Ui::CAircraftComponent> ui;
             CUpdateTimer *m_updateTimer = nullptr;
         };
-    }
-}
+    } // ns
+} // ns
 
 #endif // guard