Documentation and System Update app icons can't be themed

[Raindrac]

Describe the bug

The Documentation and System Update shortcut icons can't be themed.

What did you expect to happen?

I expected that it would be possible to theme them.

Output of rpm-ostree status

No response

Output of groups

No response

Extra information or context

Because the .desktop files for the Documentation and System Update shortcuts provide the icon location through a file path instead of an icon name, it's not possible to theme them. This could be fixed by saving the icon's image files to /usr/share/pixmaps/. That'll register their icons into the icon database so that the .desktop files can provide a file name instead of a specific location, thus making them themable. 🙂