"Overwrite" prediction mode for mosh (roam)

[dtinth]

Thanks for building rootshell! Loving it so far.

With terminal multiplexers like Zellij, the "overwrite" prediction mode (MOSH_PREDICTION_OVERWRITE=yes) gives a better result — preventing pane borders from being shifted by pending character.

By the way, I saw setPredictOverwrite in the code, but it doesn't seem to be wired up anywhere.

[kitknox]

I can confirm this is currently not wired up and will look into changing this. In the meantime I do suggest giving tssh a try if you haven't already as I suspect you will be happier with its performance compared to mosh.

[kitknox]

@dtinth This is now wired in as a setting in 1.0.11-137.