Support setting configuration values from GNOME Control Center and Xresources

[moritzheiber]

Is your feature request related to a problem? Please describe.
It's currently impossible to use GNOME Control Center to set your wallpaper persistently across sessions. It's only set once, and if not persistent using Xresources, the setting is dropped once the session resets. This is confusing, especially for first time users.

Describe the solution you'd like
Ideally we would figure out a way of setting the wallpaper either through GNOME Control Center or through Xresources.

References:
#421
#417

[kgilmer]

I believe this issue will be resolved when #368 makes it into user's hands.

Before 368, every time a Regolith session was started, a hash was generated of all Xresource values. If the hash matched the last hash (stored in a user directory), then no mutation against gsettings from Xresources was performed. The intention was that if users use GNOME to set the wallpaper, Regolith would not change the wallaper until/if some Xresource change was made. This is how it works for me but it's not working for everybody. I'm unsure of why it does not work for some people.

In any case, after 368, the session init will do nothing with gsettings except at install time (gesttings overrides applied to the Regolith session). So I believe it will become a "last one wins" situation in which a user can either change (gtk theme/wallaper/etc) via a GNOME tool, or via Xresources/regolith-look and either one will just "stick".

This should be verifiable in unstable at this point.

[moritzheiber]

@kgilmer Getting your attention back to this .. I just talked to somebody on Slack and they told me they weren't seeing this fixed even after having upgraded to the latest release (which should include the fix for #368). I haven't tried myself, but do you still believe this to be "solved"?

[kgilmer]

The remaining work here is to simply update the documentation on https://regolith-linux.org/docs/getting-started/configuration/ to add to the wallpaper description that Xres is another option for specifying wallpaper and the specific Xres override to ignore Xres and stick with gnome.

[kgilmer]

Documentation has been updated: regolith-linux/website@ad7330d

Closing but please re-open if there is something I've missed.