Description of problem:
When I open Discover and go to Settings, I can configure my repos. Due to some other bugs, the only repos which I could successfully enable/disable were the ones under "Firmware Updates" section. However, when I click on the checkbox, it seems that "nothing happens". But it is just a redrawing problem. If I switch to a different panel (e.g. About) and back to Settings, the checkboxes are correctly redrawn, and the repositories were properly configured (I checked with `fwupdmgr get-remotes`).

Tested in a virt-manager VM with virtio+spice graphics and a Wayland session. If I have time, I might be able to also try this on bare metal, whether this could be graphics driver related.


Version-Release number of selected component (if applicable):
kf5-plasma-5.85.0-2.fc35.x86_64
plasma-discover-5.22.5-1.fc35.x86_64

How reproducible:
always

Steps to Reproduce:
1. install a clean F35 KDE
2. open Discover -> Settings
3. under Firmware Updates, try to toggle some checkboxes. See if they change state correctly. If not, switch to About and back to Settings, they should be redrawn now.


Additional info:
So this is just a graphical glitch. But at the same time it's quite troublesome, because the users will probably not realize this, click on the same checkbox a couple more times (again, "nothing happens"), perhaps also click on some other nearby checkboxes, and then close the application as "not working". This will leave their system probably badly misconfigured.