refs #392 Add config window for FSX

* Added plugin_fsx_config subproject
* Removed CSettingsFsxComponent from BlackGui
* Added CSimConnectSettingsComponent
* Add x-plane_install_10.txt path for Windows

src/plugins/simulator/xplane_config/simulatorxplaneconfigwindow.cpp

@@ -5,6 +5,8 @@
 #include <QStringBuilder>
 #include <QFileDialog>
 #include <QMessageBox>
+#include <QStandardPaths>
+#include <QStringBuilder>
 
 using namespace BlackGui;