Bug 514445

SUMMARY
When I enable the "Do not show unused categories", the unused categories don't dissapear in the "Categories" view. Additionally, the message "Note: Unused categories are not shown by default as selected by settings" is always shown, regardless if the option is enabled or not

STEPS TO REPRODUCE
1. Open a .kmy file with unused categories
2. Go to Settings -> Configure KMyMoney -> General -> Filter and enable "Do not show unused categories" 

OBSERVED RESULT
Unused categories remain visible in the categories tab.
When the option is disabled, the text "Note: Unused categories are not shown by default as selected by settings" is also shown

EXPECTED RESULT
Unused categories would dissapear, as suggested by the message in the UI
The UI message doesn't appear when the option is disabled

SOFTWARE/OS VERSIONS
KMyMoney: 5.2.1
Alkimia: 8.2.1 (build against 8.2.1)
Aqbanking: Unknown (build against 6.9.0)
Gpgme: Unknown (build against 1.24.3)
Gwenhywfar: Unknown (build against 5.14.1)
KDiagram: Unknown (build against )
libical: Unknown (build against 3.0.20)
libofx: Unknown (build against 7.0.4)
SQLCipher: Unknown (build against 3.46.1)
KDE Frameworks: 6.21.0
Qt: Using 6.10.1 and built against 6.10.1
Flatpak
KDE Flatpak runtime (Wayland)
Build ABI: x86_64-little_endian-lp64
Kernel: linux 6.18.3-arch1-1