Installs a panel on the editor.

        :param panel: Panel to install
        :param position: Position where the panel must be installed.
        :return: The installed panel

def register(self, panel, position=Panel.Position.LEFT):
        """
        Installs a panel on the editor.

        :param panel: Panel to install
        :param position: Position where the panel must be installed.
        :return: The installed panel
        """
        assert panel is not None
        pos_to_string = {
            Panel.Position.BOTTOM: 'bottom',
            Panel.Position.LEFT: 'left',
            Panel.Position.RIGHT: 'right',
            Panel.Position.TOP: 'top',
            Panel.Position.FLOATING: 'floating'
        }
        logger.debug('adding panel %s at %s' % (panel.name,
                                                pos_to_string[position]))
        panel.order_in_zone = len(self._panels[position])
        self._panels[position][panel.name] = panel
        panel.position = position
        panel.on_install(self.editor)
        logger.debug('panel %s installed' % panel.name)
        return panel