constructor() {
        this.panel = new InfoPanel(this);
        this.$checkbox = null;
    }
Base class for plugins.

This module defines methods to render and mount plugins to the toolbar.
Each plugin will define four methods:
    getTitle: title to display in the toolbar
    getDescription: description to display in the toolbar
    run: code to run when the plugin is activated from the toolbar
    cleanup: code to run when the plugin is deactivated from the toolbar