Bug 477063

Created attachment 163197 [details]
In that screenshot, you can see the mailbox selector remained in the dark colorscheme, while the email content changed to the dark colorscheme.

Description: SUMMARY
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Part of KMail's UI seems to 'get stuck' on the last colorscheme it updated to, and not update in colorscheme uniformly.

STEPS TO REPRODUCE
1. Set colorscheme to breeze-light
2. Open KMail
3. Set colorscheme to breeze-dark

OBSERVED RESULT

Part of the UI (the mailbox selector and the message list) does not update it's colorscheme

EXPECTED RESULT

The whole UI's colorscheme will update correctly

SOFTWARE/OS VERSIONS
OS: Arch Linux
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.112.0
Qt Version: 5.15.11
Graphics Platform: X11

ADDITIONAL INFORMATION

All other KDE apps I've tried, such as Dolphin and Kate seem to handle changing colorschemes while it's running gracefully, both minimized and visible. So It appears to be unique to KMail.