fix #25648: move accidentals with notes/chords
fix #25803: account for user offset during chord layout
fix #25809: space before initial chord with grace note after
update vtests
fix #15125: spacing of lyric on offset note
fix #25822: space for items attached to chord must respect offset
cleanup; fix & update tests
fix #11622: spacing of grace notes with ledger lines
fix enum error
enforce minimum gliss length
fix missing enum
fix #25877: fix horizontal position of scoop
add vtest
Merge pull request #928 from MarcSabatella/25648-move-accidentals

fix layout issues with offset chords & notes
Merge pull request #936 from Jojo-Schmitz/enum-class

convert as many "enum" as possible to "enum class", and make them ": char" in the due course #4