unable to highlight for copy paste.

This could be solve by having a hotkey that toggles mouse event listening.

Extra 1:
In this mode you might make ctrl-w+direction navigate "window focus" like in vi.

Extra 2:
It would be nice to have ways to get the jpterm to output either the Expression of the Result on exit. Maybe after receiving F5 you could prompt...

```
Exiting. Return value: [Nothing/Expression/Result/Cancel-Exit]?
```