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/plugins/simulator/fsx/simulator_fsx.cpp

@@ -21,8 +21,6 @@
 #include "blackcore/interpolator_linear.h"
 
 #include <QTimer>
-#include <QtConcurrent>
-
 #include <type_traits>
 
 using namespace BlackMisc;