JACK Transport reposition
JACK Timebase slave: sync to JACK tempo
Changed Preferences->I/O ui, added 'Use JACK Transport' and 'Timebase Master'
JACK driver: change preferences without unload
JACK restoring audio connections
Bug fixes
Improve bar line Inspector and Palette

**Inspector**
- Align span combo item names with palette names
- Add a [Custom] span item: it is informative only, cannot be selected and is set by the Inspector for spans which do not match any built-in span
- Implement proper selection of span combo item when a bar line is selected in the score
- Enable/disable type combo items according to bar line type (repeats cannot be turned on/off for individual bar lines)
- Implement spanTypeActivated() to set in the score the span selected in the Inspector

**Palette**
- Labels for styles and spans made clearer (hopefully...)
Fixing voltas not copying between pre-existing parts.
fix #28041: image z-order
Added subtype filtering in select similar window
Added subtype function to articulations.
Added subtype to accidental
Added subtype for dynamics
Added subtype for tremolo
Moved note head names from inspector.ui to note.h
Added subtype for note - notehead group
Disabled subtype checkbox when subtype for element does not apply
fix #27781: wrong articulation position on stemless notes
Merge pull request #1043 from BartlomiejLewandowski/similar-subtype

Similar subtype
fixes & vtest for whole notes