fix #24574

use flat and sharp symbols in dialogs and tooltips
some more changes for fix #24574

these may need further changes though to become translatable
Only ASCII in .cpp files

using \u266d for b and \u266f for #
fix typo
fix #24628: Play always starts in the wrong place + fixes for loop playback and repeat
fix #24623: [MusicXML] Line style for ties not exported