Resources cannot be read under Designer

I have created QWidget, resources and set the prefix as /files and add one image,
then in StyleSheet Editor I set

Code:

---

background-image: url(:/files/m_bottom.png)

---

the background should be seen - it's not, so I used absolute path by what I have avoided resources:

Code:

---

background-image: url(/root/Desktop/files/m_bottom.png);

---

this way the background is displayed

the same issue under Windows - but much worse, I can't set any path which makes Designer to display the image, but it's fine during run-time.

That forced me to use Designer under X11 - still the half expected not working as should

Is the resource file associated with the form you are editing in Designer? Do you see the images in resource editor in Designer?