Remove 'page title parts' mechanism in scripts

- catall.py
- disambredir.py
- imagetransfer.py (reduces one part of bug 68659,
                    and fixes usage help in docstring)
- interwiki.py
- makecat.py (fixes bug 69062)
- solve_disambiguation.py

Should also resolve intermittent build error:
https://travis-ci.org/wikimedia/pywikibot-core/jobs/31504947

Continues:
    Ic5983b64cbc0cd96c98c105574ccb1db6dbaf9a6

Change-Id: I1eebb39c0c033e53bd0d240307f755076cb848ec
Merge "Remove 'page title parts' mechanism in scripts"