Removed many memoryleaks in Example Browser, reducing some technical debt.

When running the Example Browser with Basic Example, 'visual leak detector' show no leak.
Many other individual examples still leak, so it is work-in-progress.
Disabled the profiler window (too many leaks)

examples/OpenGLWindow/SimpleOpenGL3App.cpp

@@ -655,8 +655,9 @@ SimpleOpenGL3App::~SimpleOpenGL3App()
 	delete m_primRenderer ;
 	sth_delete(m_data->m_fontStash);
 	delete m_data->m_renderCallbacks;
-	m_window->closeWindow();
 	TwDeleteDefaultFonts();
+	m_window->closeWindow();
+	
 	delete m_window;
 	delete m_data ;
 }