clefs, time signatures, and key signatures

[Werner LEMBERG]

Folks,


please have a look at Merge Request 2188 and comment there on how to
proceed with the new distances between clefs and time signatures,
together with the new distances between clefs and key signatures.

  https://gitlab.com/lilypond/lilypond/-/merge_requests/2188

The question is whether the new distances should be based on the
widest standard clef glyph (which is the alto clef, and which is done
currently in the MR), or whether they should be based on the most
common one, the treble clef.


    Werner