Fretboard Diagram - Inspector: top cut off for Frets number greater than 9

In versions at least 3.5 and 3.6 or even earlier,
when the Frets number exceeds 9, the top of the diagram is cut off.
This is due to the diagram image centered in its panel.

This issue could be resolved by either:
- aligning the diagram to the top in the inspector (the simplest solution)
- or adjusting the panel height based on diagram height.

Background: The larger Frets number is used when positioning the diagram horizontally and showing larger fret sweeps, optionally including open strings.