A value is needed to be modified in start: function of var EditMenuDialog of odoo website.contentMenu.js file . I want to modify a number in my custom module. The maxLevels need to be changed to 3 from 2.

\https://github.com/odoo/odoo/blob/10.0/addons/website/static/src/js/website.contentMenu.js#L210

In here maxLevels is set to 2 by default in odoo:

start: function () {
    var r = this._super.apply(this, arguments);
    this.$('.oe_menu_editor').nestedSortable({
        listType: 'ul',
        handle: 'div',
        items: 'li',
        maxLevels: 2,
        toleranceElement: '> div',
        forcePlaceholderSize: true,
        opacity: 0.6,
        placeholder: 'oe_menu_placeholder',
        tolerance: 'pointer',
        attribute: 'data-menu-id',
        expression: '()(.+)', // nestedSortable takes the second match of an expression (*sigh*)
    });
    return r;
},

I need to change the maxLevels to 3. How can I do that by inheriting it?

TIA