Dear Andreas.
Thank you for the clarification. I personally didn't file that bug but I was planning to. Since it was exactly what I was planning to describe I just referenced it. Last night I was trying to rebuild libgda from stable with "--with-ui" argument. I got an error when start compiling test modules. I am not sure how to skip this step but it looks like it is a part of ui compilation. The code contains a lot of obsolete code that should be fixed in upstream (needs to be checked). I will continue investigation but it looks like we had an issue with compilation ui module and that is why it was switched off. Make sense.
All the best,