Backups will run although no sources are specified if `--paths-from-command` is supplied.
Also arguments after `--` will be appended to the end of the command after all other arguments.
Closes#1537.
* src/vorta/borg/create.py
* tests/test_create.py : Add test for using `--path-from-commands`.
Co-authored-by: real-yfprojects <real-yfprojects@users.noreply.github.com>
