ui/ncurses: Update cui_run_cmd() to pass display to command

Update cui_run_cmd() to setup a process that uses 'raw_stdout' so that
output is displayed on the screen instead of being caught in the log.
Also update cui_run_cmd() to take a more generic list of arguments, and
add a cui_run_cmd_from_item() wrapper for the existing user.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>