Color of Export Button after completed correction

Summary

Steps to reproduce

Correct an exam, so that every feedback is final

Example Project

What is the current bug behavior?

the button is red and the tooltip is wrong

What is the expected correct behavior?

should be green and the tooltip should say that everything is corrected

Possible fixes

The bug exists due to a bug in the isCorrected getter, which is due to to the changes of the data returned by the statistics endpoint