I couldn't find a way to click the links while editing and go to the target page. It's not easily available in the source editor, so it's not really a regression, but I find myself needing this features every time I edit, because the links are blue and look like links.
GMail and Google have reasonably good ways of going to links' targets in editing mode, so hints can be taken from them.
Version: unspecified
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=50321