[BUG] Settings do not persist on Fedora Silverblue 39, Gnome 45.5

[zilexa]

NOTE:
GNOME will sometimes report errors associated extensions if you manually update them via the extensions website. These errors can be resolved by restarting GNOME shell (logging out and then back in again). If it's still creating errors, then please go ahead create an issue.

Describe the bug

To Reproduce
Steps to reproduce the behavior:

1. Via the systray icon, open the Settings screen.
2. change Shuffle Interval to "user defined interval". Go to debug tab, set interval to max and resolution to UHD.
3. Close settings.
4. Repeat step 1, notice everything you changed is undone.

Desktop (please complete the following information):

• OS: Fedora Silverblue 39
• Extension Version: 49
• GNOME Version: 45.5

Additional context
It is weird that the first tab allows for "user defined interval", but no option becomes available to set the interval.
Most people wont touch the debug tab, not knowing that is the place to set the interval. It is 1 single setting, spread over 2 tabs.
Additionally, having to define an interval for wallpaper shuffling in seconds does not seem to make a lot of sense? Why not hours? Or even provide a drop down of hours/days and a box to fill in a number. Anything but seconds really..
Other than that I love this extension!

[neffo]

UHD resolution is default, so you don't need to select that to get full UHD resolutions. These drop downs do seem to be bugged though.

The debug setting being in seconds is just due to the fact it's exposing a raw internal setting for people who want custom intervals (it was a request). I'm not expecting many people to use it.