Register some more windows

So they get an entry in the Window menu, and window related shortcuts
are registered correctly.

Change-Id: Ie7e882a009f928f1268fdd312e7fb5362f6a837f
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/cppeditor/cppeditorplugin.cpp

@@ -516,6 +516,7 @@ void CppEditorPluginPrivate::inspectCppCodeModel()
         ICore::raiseWindow(m_cppCodeModelInspectorDialog);
     } else {
         m_cppCodeModelInspectorDialog = new CppCodeModelInspectorDialog(ICore::dialogParent());
+        ICore::registerWindow(m_cppCodeModelInspectorDialog, Context("CppEditor.Inspector"));
         m_cppCodeModelInspectorDialog->show();
     }
 }