Bug 429129

SUMMARY
Changing to an other global theme, with other systemcolors, does not effect applications such as Thunderbird and Firefox. This only affects them after a reboot. But changing just the system colors from the "color" module of the kde systemsettings does so immediately.

STEPS TO REPRODUCE
1. Change to other global theme with global theme module of systemsettings
2. Start various applications
3. Thunderbird and Firefox will not have adapted to the newly chosen colorscheme

OBSERVED RESULT
Gtk applications stick to the previous system colors

EXPECTED RESULT
Gtk applications follow the colors of the global theme


Operating System: KDE neon 5.20
KDE Plasma Version: 5.20.3
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1
Kernel Version: 5.9.0-050900-generic
OS Type: 64-bit
Processors: 4 × Intel® Celeron® J4105 CPU @ 1.50GHz
Memory: 7.4 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 600

ADDITIONAL INFORMATION