Sorry no terminal emulation available. I wrote VT100 emulator years ago for PCs and I don't think I'll be going back down that path again. Cursor control... may be I'll have a think on that one.
Version 3 of the ESM has been replaced with V4. Enhanced Serial Monitor - ESM4 new error reporting system - Interfacing w/ Software on the Computer - Arduino Forum
A new update of 4 is due soon with some clean ups.