After I have installed Geary mail client from the Flathub repository, the icons are bad rendered, with vertical separators bethween. Any solution ? The version is 3.38 I think.
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You're right, it does look pretty bad.
This appears to be some quirk when using the elementary icon theme with Geary.
It's possible to set the
GTK_THEME to the Adwaita icon theme which looks much better.
You can set the theme when running Geary with the following Flatpak command.
flatpak run --env=GTK_THEME=Adwaita org.gnome.Geary
To avoid the hassle of opening Geary from the command-line you can make this setting the default behavior by overriding it.
Use the following command to override this behavior for the Geary Flatpak installed in per-user mode.
flatpak override --user --env=GTK_THEME=Adwaita org.gnome.Geary
To override this setting for a system-wide installation of the Geary Flatpak, use this command.
sudo flatpak override --system --env=GTK_THEME=Adwaita org.gnome.Geary