Check if tor is installed before running some commands.
Handle errors with Tor HS configuration.
Show info about installing Tor if it is not already installed.
Don't show configuration error when Tor HS is not available

When we configure a Tor hidden service and haven't yet run Tor at least
once, then Tor hidden service hostname and private key are not
available.  This situation requires running Tor atleast once and is not
a configuration error.  When Tor runs, it see the hidden service
configuration and creates the Hidden service information.