Bookmark sets #1
Description
When working in different projects it's sometimes required to switch to different set of paths which share the same meaning. Currently it requires a set of separate bookmarks (keywords) to be used. For example, it may be required that while working on project X "go source" should change the directory to X/src, while working on project Y the expected behavior after is to change the directory to Z/contrib/Y/src.
Requested feature should allow for easy switching between two sets of bookmarks. A single name used for bookmark can appear in any set.