#4 Option to prepend directory

[Mark Carter]

In the inputs panel, when you add a job, it would be
nice to have the option to prepend the last part of the
local directory to the first part of the remote directory.
Otherwise, I find that the directory contents from
several jobs can be mixed up.

The local and remote edit boxes should be editable by
the user, so they can adjust the entries as they see fit.