move app outside of header so its cleaner and possibly doesn't cause problems

Author: nbollom

gtk/pq2gtk.cpp

@@ -10,6 +10,8 @@
 #include "charactercreator.hpp"
 #include "gamescreen.hpp"
 
+Glib::RefPtr<Gtk::Application> app;
+
 GTKGUI::GTKGUI(const std::shared_ptr<Game> &game) : GUI(game) {
     message_handler = [this](const std::string &message) {
         HandleMessage(message);

gtk/pq2gtk.hpp

@@ -6,15 +6,13 @@
 
 #include <memory>
 #include <string>
-#include <gtkmm/application.h>
 #include "pq2gui.hpp"
 #include "game.hpp"
 
 class GTKGUI final : public GUI {
 
 private:
     MessageHandler message_handler;
-    Glib::RefPtr<Gtk::Application> app;
 
     void HandleMessage(const std::string& message);