fix #31146: don't link part name when adding to part
Merge pull request #1428 from MarcSabatella/31146-part-name-link

fix #31146: don't link part name when adding to part
fix #33051
fix #35466
reduce undo/redo memory leak
Delay the creation of QFont objects after complete startup. On some plaforms, QFont needs an initialized QScreen etc...
fix possible crash in undo redo accidentals
fix slur/tie regression