Qbs Project Manager: "Generated files" folder is shown even if "Hide generated files" is active

For Qbs projects, the "Generated files" folder is shown for each product in the project tree, even if one has explicitly selected "Hide generated files" via the "Filter tree" button. Actually the "Hide generated files" option seems to have no effect in Qbs projects. What the user expects is being able to filter out the generated files normally, and have the option to show them when needed.