Loads the last visible toolbars from the .ini file.

def load_last_visible_toolbars(self):
        """Loads the last visible toolbars from the .ini file."""
        toolbars_names = CONF.get('main', 'last_visible_toolbars', default=[])

        if toolbars_names:
            dic = {}
            for toolbar in self.toolbarslist:
                dic[toolbar.objectName()] = toolbar

            toolbars = []
            for name in toolbars_names:
                if name in dic:
                    toolbars.append(dic[name])
            self.visible_toolbars = toolbars
        else:
            self.get_visible_toolbars()
        self._update_show_toolbars_action()