sparky-backlight's icon is missing

[oliveit]

The package sparky-backlight uses an icon called `preferences-desktop-display-color` for the tray. It isn't on my system in any installed icon packs which are Adwaita, GNOME, HighConstrast and Tango. With the exception of Tango they do all have `preferences-desktop-display`.

IMO the icon without `-color` is better anyway: . Vs `-color` variant: . This little tool doesn't modify the color of the screen so that's not the right icon.

Not sure best way to resolve. Include a fallback icon to use if theme doesn't have one?

I am not sure if there is any generic/default icon set that can be relied upon.
Gnome Adwaita has this one that might be a good candidate: `video-display.svg`:

https://wiki.sparkylinux.org/doku.php/sparky_backlight
https://github.com/sparkylinux/sparky-backlight/blob/master/bin/sparky-backlight