Bug 508972

SUMMARY
Edit multiple KCMs in parallel. (A generalization of https://bugs.kde.org/show_bug.cgi?id=503767.)

STEPS TO REPRODUCE
1. Have a KCM open in System Settings, have unsaved changes in it.
2. Open another KCM, e.g. via Plasma UI. Examples:
    * Create new activity (as described in https://bugs.kde.org/show_bug.cgi?id=503767)
    * Click Network icon in system tray -> Configure network connections.

OBSERVED RESULT
System Settings requires that user chooses to save or discard or cancel.

EXPECTED RESULT
There should be a possibility to make changes in parallel, as long as the user edits two different KCMs.

I think the current behavior is a regression since KDE 4 (or later) because back then one could open a KCM without the whole System Settings UI, and the KCM window could coexist with another full System Settings window and with other KCM windows.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 41
KDE Plasma Version: 6.4.1
KDE Frameworks Version: 6.15.0
Qt Version: 6.8.3
Kernel Version: 6.15.4-100.fc41.x86_64 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 16 ГиБ of RAM (15.4 ГиБ usable)
Graphics Processor 1: Intel® HD Graphics 530
Graphics Processor 2: NVIDIA GeForce GTX 960M


ADDITIONAL INFORMATION