Application icon broken in Flatpak installs

[mairin]

Bug description

In Flatpak installs and Linux installs, the application icon for Podman Desktop is missing. When you see it in the GNOME overview, for example, or in the dash, it looks like this:

The icon packaged with it is this one and this is what should be showing up:

The Flatpak matrix channel gave me some help in trying to debug why the icon isn't showing up because it seems to be set up correctly. We discovered a likely cause of the issue.... here is the path of the icon on my installed system:

/var/lib/flatpak/app/com.github.containers.desktop/current/active/files/share/icons/hicolor/0x0/apps/com.github.containers.desktop.png

It looks like electron is taking the icon and putting it in an "0x0" directory under the icons/hicolor directory. "0x0" is not a supported type and doesn't export the artwork properly. This is apparently a known issue with electron, from at least 2020 (see electron-userland/electron-builder#5294).

There are some workarounds in the related issues on that issue... this looks like a helpful workaround here:

_electron-userland/electron-builder#5294
develar/app-builder#42

since there is no fix so far, looks like the workaround is might be to use path to icon set directory or macOS icns file
https://www.electron.build/configuration/linux_

Operating system

Fedora 36 / x86_64

Version

next (development version)

Steps to reproduce

1. Install either the flatpak on Linux.
2. Launch podman-desktop, noting the application has no icon

Relevant log output

No response

Additional context

No response

[mairin]

This works great on F36 now, thanks! :)