Add capability to disable the Sites dropdown for Link option

[JayBox325]

What are you trying to do?

I have a minimal Vizy configuration as follows:

{
    "buttons": ["formatting", "clear-format", "unordered-list", "ordered-list", "italic", "bold", "link", "undo", "redo"],
    "commands": [],
    "formatting": ["h2", "h3", "h4", "paragraph", "blockquote"],
    "toolbarFixed": true
}

And this works great, however, I am using a multi-site setup where there shouldn't be cross-site linking (for now) as when an author is in their site, they shouldn't be aware of any other sites on the platform. However, when I add an entry as a link, a sites dropdown appears showing all available sites which is not what we are looking to do.

What's your proposed solution?

Add some way of configuring the link option to disable the sites dropdown.

Additional context

No response