Delete cad dock AFTER map tools, as they may reference it in their cleanup code

src/app/qgisapp.cpp

@@ -1854,9 +1854,6 @@ QgisApp::~QgisApp()
 
   mNetworkLoggerWidgetFactory.reset();
 
-  delete mAdvancedDigitizingDockWidget;
-  mAdvancedDigitizingDockWidget = nullptr;
-
   delete mInternalClipboard;
   delete mQgisInterface;
   delete mStyleSheetBuilder;
@@ -1865,6 +1862,10 @@ QgisApp::~QgisApp()
     mMapCanvas->unsetMapTool( tool );
   mMapTools.reset();
 
+  // must come after deleting map tools
+  delete mAdvancedDigitizingDockWidget;
+  mAdvancedDigitizingDockWidget = nullptr;
+
   delete mpMaptip;
 
   delete mpGpsWidget;