Selfloops edge labels cannot be inlined

[soerendomroes]

Describe the bug
Feedback edges are not inlined, as seen here.

Expected behavior
I expected the "test" label to be inlined similar to "test2"

ELK Version
0.8.1 in elklive and local master branch. This should have been fixed in 0.9.0.
https://eclipse.dev/elk/downloads/releasenotes/release-0.9.0.html (Inline edge labels are now correctly centered (hopefully).). Maybe this issue did only tackle this for non-self-loops?

Additional context
See lf-lang/lingua-franca#2259

[soerendomroes]

The issue persists since self-loop labels do not appear as nodes in LabelSideSelector