Resizes current grid by appending/deleting rows, cols and tables

def OnResizeGridDialog(self, event):
        """Resizes current grid by appending/deleting rows, cols and tables"""

        # Get grid dimensions

        new_shape = self.interfaces.get_dimensions_from_user(no_dim=3)

        if new_shape is None:
            return

        with undo.group(_("Resize grid")):
            self.grid.actions.change_grid_shape(new_shape)

        statustext = _("Grid dimensions changed to {shape}.")
        statustext = statustext.format(shape=new_shape)
        post_command_event(self.grid.main_window, self.grid.StatusBarMsg,
                           text=statustext)

        event.Skip()