Dismiss the on screen keyboard too when shutdown

src/main_loop.cpp

@@ -28,6 +28,7 @@
 #include "guiengine/engine.hpp"
 #include "guiengine/message_queue.hpp"
 #include "guiengine/modaldialog.hpp"
+#include "guiengine/screen_keyboard.hpp"
 #include "input/input_manager.hpp"
 #include "modes/profile_world.hpp"
 #include "modes/world.hpp"
@@ -371,6 +372,7 @@ void MainLoop::run()
 
             // In case the user opened a race pause dialog
             GUIEngine::ModalDialog::dismiss();
+            GUIEngine::ScreenKeyboard::dismiss();
 
             if (World::getWorld())
             {