QT 5 - load images from the same folder as the stylesheet (.qss) - c++

Question

In my QT app I allowed users to load .qss stylesheets as a custom theme.
This however is problematic since they could not load images in the styles initially.
After a bit of digging it happens that relative paths in the stylesheet are resolved towards the current working dir, and not towards the stylesheet path (which QT cannot know since we load it as a string).
So the only "hack" that I could come up with is to change the current working path to the folder where the stylesheet is located, like so:
if (KreatorSettings::instance().customTheme().isNull() == false) {
QString qsFileName(KreatorSettings::instance().customTheme());
QFile qfFile(qsFileName);
if (qfFile.exists()) {
if (qfFile.open(QFile::ReadOnly | QFile::Text)) {
QDir::setCurrent(QFileInfo(qsFileName).absolutePath()); // needed
qApp->setStyleSheet(QLatin1String(qfFile.readAll()));
loadedCustom = true;
}
}
This is an example of how the images are defined in the stylesheet:
QCheckBox::indicator:checked
{
image:url(icon_checkbox_checked.png);
}
This is obviously not the right way, since I need to keep that current working path for the "skin" to work.
Is there a way in qss to use path relative to the stylesheet or some other method to use paths that do not require either embedding resources or changing the current working dir? Maybe we can tell QT what is the stylesheet root folder so it resolves from there? I have no clue, so need your help.
I would hope there is something like in CSS, or else the QT team made some major mistake in the design making the *.qss files unfit for user customization.