do nothing fancy with barline and accolade when splitting staff
fix #20558: Split staff creates incorrect results
fix #10827: Clef changing
fix #20233: Pedal marks not deletable
fix #19287: Removing and adding linked staff and creating score causes crash
somes fixes in instruments.xml, fix #19019
fix #19312: Drums in 1.2 score have a treble clef after enabling Concert Pitch
fix some tests
fix tests
fix insertion of title, subtitle,... from menu
small fix to instruments.xml

for D Trumpet
Merge pull request #279 from Jojo-Schmitz/master

small fix to instruments.xml
fix #18012: Stem detaches when adding particular drum note lower than existing one. fix #15101 too.
do not allow drum note dragging
fix #17940: setting distance between beam doesn't work