Ok, first of all, we launched an update V0.8 which fixes the bugs with LINK in the sidebar (mobile) menu, and also makes them work correctly in the page listing:
viewtopic.php?f=51&t=8448
I didn't add any "suppression" yet, because I am not 100% sure it is needed now that the links are working correctly.
alexhenes wrote:It would be nice to suppress links from showing up in lists of folders/galleries. I think it is confusing for the user to think they are opening a gallery and have a new tab open.
To be honest, if you are using external links in the menu already, I don't see how that is any less confusing that listing the external links in a parent page. Besides, if you have a category (as I think you had) with child page links, what happens if they click that category ... will there be nothing inside, if all the links are suppressed? Personally, I didn't mind clicking your parent category as have it list all the links ... I quickly understand the idea if the links open in new windows with unrelated data anyway, and there is no way around that.