Implement 'outside' and 'inside' placement for ties

[oktophonie]

Currently, MuseScore draws ties between single notes 'outside' the notes and ties between chords 'between' the notes; see the first half of each bar here:

We need to enable the opposite: 'inside' ties between single notes, 'outside' ties between chords (for all notes in a chord where it's possible); see the second half of each bar.

This should be done by:

• a style setting for ties between single notes: Outside (default)/Inside
• a style setting for ties between chords: Outside (default!)/Inside
• for any given tie, a property override to specify its inside/outsideness: Auto/Inside/Outside