Virtual "Source" and "Header" folders

It seems that in new version of QT Creator some virtual folders called "Source Files" and "Header Files" were added in "Project" tree, which I find not convenient. I'd like to keep my header and source files in one folder and close to each other, but this virtual separation forces me to scroll up and down in project explorer. Is it possible to introduce an option to remove such visual feature?

I attach a screenshot of what I mean.

Thanks.