Configuring the toolbar

[schnack]

Hi!
Please add the ability to customize the "toolbar" so that i can add "layers" and "tags".

diagram_config = {
            "toolbar": "zoom layers tags" if plugin_config["toolbar"] else None,
            "tooltips": "1" if plugin_config["tooltips"] else "0",
            "border": plugin_config["border"] + 5,
            "resize": "1",
            "edit": "_blank",
        }

Thanks!