Fix MIDI import panel on file close or switch
Fix end() iterator increment
Fix moc warnings on headers that do not require QObject
increase number of cpus used for travis compilation
Merge pull request #1081 from trig-ger/midi_fixes

Fixes for MIDI import
fix some strings
fix #25806
fix warning Interval previously declared as a struct
fix #25896
fix #28661: Deleting palette doesn't work
implement 'never hide' flag for staff
fix #22579: remove visible & color from context menu
fix possible duplication of symbol
Fix title extracted from lyrics
fix #28656
fix #28651
fix #28746: Crash on changing instruments
allow list selections to get first/last ticks
make midi input follow the concert pitch setting
fix #28171