Show a message when Product is selected, that Hidden & Catalog are not excluded

[ernestmarcinko]

When selecting the Product post type the plugin should display an information box informing the user that Hidden WooCommerce products are not excluded, with possibly a link to the knowledge base explaining how to do it.˛

Example

CSS

.wdo_box-warning {
    padding: 2em;
    background: #f9f9f9;
    border-radius: 6px;
    border: 1px solid #dbdbdb;
    border-left: 6px solid #d81a1a;
    color: #161616;
}