Allows to select the staff types for the instruments in the Instruments dlg box
fix #20545: no dash for lyrics attached to secondary voice
Fix #20503: implement "Show barlines" setting of "Edit staff types" dlg box.

Bar lines belonging to a single staff are shown/hidden according to the staff type setting.

Bar lines spanning several staves are shown/hidden according to the setting of the staff type of the first spanned staff.

System bar lines (bar lines at the beginning of a system) are NOT hidden, regardless of the setting.
If bar lines are not shown, hide also elements attached to them.
Merge pull request #270 from mgavioli/Fix_#20503_staff_type_ShowBarlines_setting

Fix #20503: implement "Show barlines" setting of "Edit staff types" dlg box
Added support for "Add staff" and "Add linked staff" buttons
Add support for changing staff type(s) in "Create | Instr." dlg box to any defined type (either existing in the score or a preset)
Merge pull request #283 from mgavioli/Instrument_dlg_add_staff_types

Instrument dlg and wizard: add a combo box to staves to select the staff type