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...)
fix #28041: image z-order
Added selection range filter to Select Window
Bar line inspector consistency for span data

- Selecting a built-in span type updates other span values
- Added a check function enforcing correctness and consistency of span data (Span, From, To); it also set spin box mins and maxes to avoid meaningless values (like From below To and so on)
- Removed array of built-in span type data; span type are different enough to make a table useless: ad-hoc code is needed for most of them.
- Removed legacy, commented-out code
- Set mins for span value spins in .ui
- A few typos here and there
More legacy code removed
Initial support for percussive staffs, possibly some noteheads used here will change
A little refactoring and some support for simile markings
Support for tuplets and double bar simile markings in GPX files
Refactoring and improving playback on GPX format - improvements to importing percussion still need to be made (drumset)
Guitar Pro implementation split up, support also for ties, grace notes, slides and other minor articulations.
fix #12960
Added test for paste of 2 voice
Added voice data to staff mime.
Changed paste staff behavior to overwrite only the voices included in staff mime.
make deb packages use correct architecture and increasing version
Merge pull request #1074 from akdor1154/packagingPR

make deb packages use correct architecture and increasing version
Merge pull request #1058 from jpirie/22604-slides

Slides functionality, split up Guitar Pro implementation, grace/simile marking support in GP6
JACK buffer offset fix, updated rememberAudioConnections()
Remove unused assert function
Move assert function to chords
Fix zero voice test function in drums