Headers not found in Editor / C++ code model but compiles fine. CMake based project.

This is probably the same bug as 13746 but for me it also affects Qt Widget includes. I attached two screen shots of the same file in the C++ Code Model View, one taken from QtCreator 3.2.2 another taken from 3.5.0.
The last Qt Creator version that works in that regard is 3.2.2.

It is really a really annoying issue because with a CMake based project I can't just go ahead and simply add a bunch of #includes to a "myproject.includes" file, like I would do with a simple "myproject.creator" based workflow.

I would really appreciate it if someone could look into this and hopefully fix this.