Flat symbol setting inconsistent

[ToonLWind]

Is your feature request related to a problem? Please describe.
No.

Describe the enhancement you'd like
I have been using the setting "Use flat symbol" with a project of mine, and I recently turned on the setting "Show note chart when hovering over keys" and I noticed that the note chart still displays the sharp symbol. It would be nice if the note chart displayed the flat symbol when the setting is chosen.

Additional context
A screenshot of the problem

[Bentroen]

Fixed in d8e09b8