Distance between notehead and augmentation dots

[rettinghaus]

If I'm not overlooking something, there is currently no way to declare the default distance between a notehead and its augmentation dot. Maybe we could add a key for this to the engravingDefaults?

Behind Bars defines it as "a half stave-space’s distance". But the distances seen in the example there do not follow this rule:

Behind Bars, p. 54.