Thanks a lot for considering this, I’m really hoping to see this in an upcoming version then!
And sure, most things are probably possible to do with the excellent macro or plugin system of EmEditor, but it requires quite some work from each user (and sadly I think that very few users can trust plugin DLL:s from other users), so it would of course be better for everyone if it was implemented in the core instead.
Also, I really do think that this is a feature that would make EmEditor even more attractive to potential customers, especially since several competing products already have it.