OMEdit does not seem to treat UTF-8 in its Text View

[Rüdiger Franke]

Localization of models requires doc strings with non-ASCII characters, like:

model Foo
  Real mu = 1e-6 "Does OpenModelica treat UTF-8, like µ or ö in Linköping?";
end Foo;

Encoded with UTF-8, OMEdit opens the model, but scrambles the non-ASCII characters in its Text View:

model Foo
  Real mu = 1e-6 "Does OpenModelica treat UTF-8, like µ or ö in Linköping?";
end Foo;}}}
One can edit the model and save it. One must not introduce a new non-ASCII char though, because OMEdit will replace all of them with a question mark then? 

It is possible to translate and simulate the model. The Variables Browser in the plot pane treats UTF-8 encoded doc strings correctly.

Is this a bug in the Text View of OMEdit?