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
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
add vtest for note heads
Merge pull request #568 from AntonioBL/gracenotesbeam

Beam mode for grace notes, based on the code for normal notes.
Merge pull request #566 from Isensee/23543-update_accidental

fix #23543: additional update for acidentals
fix SymbolDialog in master palette
remove timesig values from inspector
Restricts accepted characters for time sig. numerator and denominator to '+', '(', ')' and 0-9 in Time Sig. Properties dialogue box.