Indicate % cpu used for custom OSC

[ptarabbia]

Is your feature request related to a problem? Please describe. When a OSC uses too much CPU, it apparently becomes stuck and the only way to stop it is to reboot the Minilogue. Inversely, I would love to know if my OSC uses only a small amount of CPU, because it would mean I can add more features to it !

Describe the solution you'd like Have an option to display the % of CPU used by the custom OSC voices on the OLED. That way, it would be easy to monitor how changes to the code impact performance.