Hi Robin,
Thanks for reporting this. The HTML filter that I use to ensure the descriptions don’t contain nefarious code was apparently blocking the “target” attribute on web links, and so the “new window” option was getting blocked. I can’t see any reason not to allow this.
It should now be working, and you may well find that any links you have previous set to open in a new window will suddenly now start working as intended.
Cheers,
Dominic