Remove unused shortname options

[robertlipe]

• PDF maker: format screen and input same. Shrink padding slightly.
• Disallow 'fields' option when writing unicsv.
• Remove mkshort options. Fixes garmin, ozi, xcsv mkshort options whitespace_ok, must_unique broken since 2006 #982

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
+0.04%	50.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (7a144a6)	24343	16458	67.61%
Head commit (eee0061)	24330 (-13)	16459 (+1)	67.65% (+0.04%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1239)	2	1	50.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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