Maybe I'm oversimplifying a sophisticated question, but: when you say "the same Dendron notes available," do you mean "available" as in "can be linked to from any note, regardless of workspace" or do you more simply just mean "visible"? If it's the second, what I currently do is have multiple windows open, one or more of which is open to my Dendron workspace. So my Dendron notes are always ready for me to interact with—but they can't be linked to / interacted with until I click onto their window.