We're using the Desk KB more and found an issue when trying to share articles to colleagues, from within Desk.

If I want to leave a private comment on the ticket, with an article, you cannot use the side widget, because the option to 'Share a link' creates a link in a new email.

That means I need to go to the public customer portal, get the link from there and paste it in the ticket comment. 

I think a simple link to just copy the public article URL is useful for this case.