I might be wrong, I last used Cline in December, but I believe we're talking about different things.
Cline's an Agent, and you chat with it, based on which it makes edits to your files. I don't think it has manual inline edit support?
What I'm talking about is that you chat with it, you're done chatting, you select some text and say "rewrite this part as discussed" and only that part is edited. That's what I mean with inline edits.