It is currently not possible...
However, the latest dev-modular branch has an auto completion history as a plugin.
Basically, typing tab at the end of the line then enter brings up an autocomplete ui dialog.
https://github.com/transistor1/shellista/tree/dev-modular
Also, there is ShellistaUI, which is a ui version of shellista, which has history buttons. What you are describing can be done with that module... That said, I've had lots of problems with ShellistaUI locking up after running other ui modules, which seems to be because of using a custom stdin and stdout. The right answer would be to redesign shellista to separate the Cmd bits, so that ShellistaUI can make use of command parsing, etc without having to override stdin.
J