This is a very popular request these days, so probably the next big feature that I will be working on. The main difficulty is to implement a validation process for the links and to make this validated/invalid state permeate to the rest of WordPress.
Unless you think that a first pass without validation would already address the need?
Just as an update, I started doing some work towards this but then got extremely busy with work. Now that life is getting back to normal, I will try to complete this new feature in the next week or two.