Improvement on the override insert

[PeterBjuhr]

The current implementation is only an approximate solution which will hopefully work in most cases (and otherwise the user could easily manually edit this). So it would of course be preferable to improve this.

The current limitation is that it always inserts the override on a new row above the row where the link is pointing. But obviously this isn't always the right place to make the insert.

What I would like is that the insert could use the node functionality from ly.music and insert the override as a node in a more precise way.

[uliska]

I don't know the ly.music functionality so far (what a pity), and if that would be possible it would surely the best solution (as these \once \overrides won't be the only things we'll want to apply).

What I do in general in my manual coding is something like this:

c d
     \once \override ...
     e f g

That is: I put any longer tweak on its own line but indent it up to where it would normally start.
Just a suggestion, though.

[PeterBjuhr]

Currently the ordinary reformat is used.

[uliska]

... which is also why my approach isn't acceptable as a general implementation - it will be overwritten by any subsequent reformatting through Frescobaldi.