Creator lacks a variable for the active project's QT_INSTALL_BINS (and others)

There is no way to add a run configuration that runs qmlscene from the same Qt version used with the current run configuration.

%{CurrentProject:QT_INSTALL_BINS}/qmlscene

refers to the project selected in Creator, not the active project. I'd argue that that seems pretty counter intuitive, because if you want to use the binaries in the active project but accidentally click on another project before hitting run, it will use the binaries from whatever kit is current in the project that you selected.

If this is deliberate, and CurrentProject refers to the selected project, then there needs to be some way to use the active project. For example:

%{ActiveProject:QT_INSTALL_BINS}/qmlscene

Perhaps SelectedProject would be a better name than CurrentProject, in any case.