use smaller broken beam in grace notes
fixes for emmentaler-8 vtest
fix #21458: Bar rests not presented correctly at line break before key and time signature change
fix #18453: C major Key Signature get lost in nightlies if exported from concert pitch in 1.3
fix #22607: Incorrect clef imported from 1.3
fix #23543: additional update for acidentals
Initial implementation of a Range element to display a tune range
Draw line from note centre to note centre
Add support for (editable) accidentals for top and bottom note heads.

Add "Update Range" button in Inspector.
Rename to Part Range
create soundfonts and sfz directories if they do not exist
beam mode for grace notes
Renamed element to "Ambitus"
Moved dragable symbol from master palette's "Note heads" sectin to "Lines" section.
Merge pull request #567 from mgavioli/part_range_element

A new element for part range indication
add ScoreFont to Symbol class; extend master palette symbols dialog; misc cleanups
merge Ambitus
hide noteHeads array
fix mtest
remove QtTraceMsg