More visible/obvious editor links

[RobinDaugherty]

The current design does not make it obvious that it links to the editor for the specific file and line.

This could be made more obvious with a blue underline, or an arrow icon. It might even be possible to get the logo of the specific editor that is in use.

It would also be great if we can include some help, like a link to the instructions on how to configure the editor links for different editors.