Xontrib-prompt-bar

* Fix stdout list.

Use `` prompt end instead of `` for superuser.

Added `hist_status` section to show `hist off` if history disabled by [`history off`](https://xon.sh/tutorial_hist.html#off-action) command.

Git branch was returned to the default bar settings.

Sometimes it's needed to hide the return code. In this case you can use `-8888` return code i.e.:

xsh
aliases['cdls'] = "cd ($arg0) && (lambda: -8888 if len(g`./*`) > 100 else 0) && ls --group-directories-first -A --color"
cdls /
return code is 0 and `ls` command was executed and return code is not shown
cdls /usr/sbin
return code is -8888 and `ls` command was NOT executed and return code is not shown