Bug 501891

Created attachment 179655 [details]
Screenshot of one of the dropdown menus with missing text

SUMMARY
In the Window Rules KCM, all the drop down lists/menus have missing text, making it impossible to figure out which option does what without clicking every single one to check or to memorize the order. With the ones that allow selecting multiple options at once (such as window types or virtual desktops) trying to select or unselect things is also quite broken, for example I can no longer create a rule to make an app/window appear on more than 1 or 2 virtual desktops.

STEPS TO REPRODUCE
1. Open the Window Rules KCM
2. Create a new rule or select an existing one
3. Click on any of the dropdown menus

OBSERVED RESULT
The dropdown menu does not have any text for the options, and if checkboxes are present they are always unchecked

EXPECTED RESULT
The menu should contain text for each option and the checkboxes should accurately reflect the current state

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Kernel Version: 6.13.7-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 6800H with Radeon Graphics
Memory: 30.6 GiB of RAM
Graphics Processor 1: AMD Radeon 680M
Graphics Processor 2: AMD Radeon RX 6650M

ADDITIONAL INFORMATION
If I run the System Settings app from the terminal, I see the below error messages appear several times when I open one of the dropdown menus:

> qrc:/kcm/kcm_kwinrules/OptionsComboBox.qml:88: ReferenceError: bitMask is not defined
> qrc:/kcm/kcm_kwinrules/OptionsComboBox.qml:101:17: Unable to assign [undefined] to QString
> qrc:/kcm/kcm_kwinrules/OptionsComboBox.qml:115:13: Unable to assign [undefined] to QString

And when I hover over each option in the dropdown menu the error message "qrc:/kcm/kcm_kwinrules/OptionsComboBox.qml:116: TypeError: Cannot read property 'length' of undefined" appears once for every entry I hover over.