Fixing the clock signal to use GLib::Dispatcher to emit the signal so the main thread updates the clockLabel widget

src/window.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "glibmm/dispatcher.h"
 #include "minefield.hpp"
 #include <memory>
 #include <gtkmm.h>
@@ -32,10 +33,12 @@ class MainWindow : public Gtk::Window
   void updateCell(int x, int y);
   void openBombs();
   void updateFlagsLabel(int flags);
-  void updateClockLabel(size_t time);
+  void updateClockLabel();
+  void handleClockSig(size_t);
   void gameWon();
   void gameOver();
   sigc::connection clockSignalConn;
+  Glib::Dispatcher m_clockDispatch;
 //   void OpenNearCells(int index);
 //   void Explode();xo
 //   bool AllCellsOpened();