And what issue related to Rust's memory management is to be resolved?

The fact that it makes you think about it all the time, rather than using a garbage collector?

The lack of a GC is a pretty fundamental aspect of Rust's design, I don't see that changing in the foreseeable future. "As soon as memory management issue is solved" makes it sound like a small bug or missing feature that can be fixed with a little work.

That wouldn't be a fix, it would be a regression.

In an editor? This isn't a real time OS.