#87 Support HTTP/HTTPS hyperlinks

[Gitoffthelawn]

Whether in code comments, or when using Bluefish as an excellent text editor, it would be incredibly useful to support HTTP/HTTPS hyperlinks like https://www.example.com, where double-clicking on the link will open the URL in a web browser.

If this is supposed to work, please remove the "Feature request" label, and mark it as a bug in Linux.