I noticed a really interesting update to a Markdown package in Sublime Text (possibly SublimeText-Markdown/MarkdownEditing: Powerful Markdown package for Sublime Text with better syntax understanding and good color schemes.) that has a nice way to collapse Markdown links:
This is more of a visual tweak to help make Markdown links a bit more readable.
I don’t know how readily this could be implemented. It would be a nice enhancement though.
I’m not aware of similar requests.