fix #19306 : Fixing correctly the lengths of the barline
fix #19936; minor coding style updates
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.
fix some compilation warnings, add some file to CMakeList for qtcreator
simplify all.h in preparation for qt5
fix compilation warning
remove unused properties in Note object
start cleanup of regression tests
Merge pull request #197 from lvinken/musicxml-fixes

fix #19936; minor coding style updates
Fix #19923: TAB digits not centered on stem
Merge pull request #201 from mgavioli/Fix_19923_tab_digits_not_centered

Fix #19923: TAB digits not centered on stem
more test cleanup
Renamed textual Cursor class to TextCursor to avoid duplicate class name
fix #19920: crash when opening lines palette
Merge pull request #196 from Soerboe/fix19306_2

fix #19306 : Fixing correctly the lengths of the barline
fix crash in MusicXML with tie
hide additional media behind experimental flag
fix multiple bugs in fret diagram handling
hide fret diagram frame behind experimental flag
fix crash when pressing Join Score and no album