fix #19904: Import of 1.2 TextStyles for titles

Add compatibility with TextStyles for 1.2 titles:
Change the 1.2 TextStyle "Poet" to "Lyricist" for 2.0.
Remove the zeroing of Rxoff and Ryoff, which causes title, subtitle,
composer and lyricist to be misplaced.
Add a test case score
Update the test harness to include textstyles
Merge pull request #198 from softins/1.2-titles-import

fix #19904: Import of 1.2 TextStyles for titles
add creation date as a meta tag in mscx file
small build update
fix text palette crash
layout fixes for edit styled text
add -t command line to create test case files, add test documentation
rename Profile to Workspace
fix fret editing (uninitialized variable)
fix tests
more sensible default for fret diagrams