replaced _undo->push() with undo() in Score::transposeKeys()
fix for frame properties in inspector
add trackName tag in instruments.xml, use first longname when not available, store description
fix memory leak in Score::Score(Score*)
Merge pull request #271 from heuchi/20507_crash_in_transposeKeys

Fix #20507 changing concert pitch state of newly created part crashes
always use the root score undo stack
fix #17445, add regression test for repeats
Staff Type Dlg Box - TAB: Remove "on_" from slot names.


Qt uses the prefix for automatic signal-slot matching and generates run-time warnings if no match is found.
Merge pull request #275 from mgavioli/TAB_type_edit_slot_names

Staff Type Dlg Box - TAB: Remove "on_" from slot names.
fix #20508: Clefs and key sigs drawn wrongly in palettes
fix #20424: Impossible to delete a custom barline