Creates a new panel with a copy of the current widget.

def newPanelTab(self):
        """
        Creates a new panel with a copy of the current widget.
        """
        view = self._currentPanel.currentView()
        
        # duplicate the current view
        if view:
            new_view = view.duplicate(self._currentPanel)
            self._currentPanel.addTab(new_view, new_view.windowTitle())