Feature: Command to remove all bookmarks that link to undefined directories #77
Description
Thanks (again) for a great tool. I've been using this for years and it's an essential part of my workflow.
One thing I've found is that as my work flows from one project to the next and I delete (or move) old projects, many of the bookmarks I've saved become invalid (dead). Cleaning these up is somewhat annoying process. One has to try each bookmark individually to see if it still works and, if not, delete it.
It would be nice if there were a shortcut that would do this as a single command.