Disconnect all signals from the QOpenGLContext

The call stack when this assert happens indicates that there are more signals to be disconnected from the object. Crash is fixed by disconnecting all signals.

Assert seen in debug build:

ASSERT failure in caf::Viewer: "Called object is not of the correct type (class destructor may have already run)", file C:\Qt\6.6.3\msvc2019_64\include\QtCore/qobjectdefs_impl.h, line 130

Fwk/VizFwk/LibGuiQt/cvfqtOpenGLWidget.cpp

@@ -146,12 +146,11 @@ OpenGLWidget::~OpenGLWidget()
 
     if (m_initializationState == IS_INITIALIZED)
     {
-        // Make sure we disconnect from the aboutToBeDestroyed signal since after this destructor has been 
-        // called, our object is dangling and the call to the slot will cause a crash
-        QOpenGLContext* myQtOpenGLContext = context();
-        if (myQtOpenGLContext)
+        if (QOpenGLContext* myQtOpenGLContext = context())
         {
-            disconnect(myQtOpenGLContext, &QOpenGLContext::aboutToBeDestroyed, this, &OpenGLWidget::qtOpenGLContextAboutToBeDestroyed);
+            // Make sure we disconnect from the all signals since after this destructor has been 
+            // called, our object is dangling and the call to any of the slots will cause a crash
+            myQtOpenGLContext->disconnect();
         }
     }