fix #4905: Crescendo/decrescendo playback
fix #33961: 'Set as default' now enabled after removing a soundfont
fix #11096: fixed crash while changing soundfont, fixed many possible crashes
fix #33966: voltaY & mmrest settings for parts in 1.3 scores
fix #34106: problems adding elements to frames
fix #31986
fix #34046
fix #33881
Merge branch 'lvinken-musicxml-fixes'
Merge pull request #1336 from MarcSabatella/34106-frame-contents

fix #34106: problems adding elements to frames
Merge pull request #1335 from MarcSabatella/33966-volta-mmrest-13

fix #33966: voltaY & mmrest settings for parts in 1.3 scores
Merge pull request #1334 from Igevorse/midi-input

fix 33961: 'Set as default' now enabled after removing a soundfont
Merge pull request #1325 from CombatCube/4905-crescendo-playback

fix #4905: Crescendo/decrescendo playback