Created attachment 151765 [details]
Visual description of the error

First of all, I would like to thank you for your work! In KDE Gears 22.08, the look and feel of Filelight has become more convenient and pleasant :)
However, I noticed one nuisance: with a dark theme, the pop-up text is drawn in black, and not in white, as it should be. Because of this, the readability of the text is almost completely reduced to "no"


STEPS TO REPRODUCE
1. Apply KDE Plasma dark theme (whether Breeze Dark or third party theme)
2. Launch Filelight and start scanning for free space anywhere on your drive


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.97
Qt Version: 5.15.5

ADDITIONAL INFORMATION
No similar bug appears with any light theme. Only in dark theme. There have also been attempts to fix this by deleting the KDE Plasma cache and configs in ~/.config, ~/.cache and ~/.local/share - no result