Sets the icon for the bookmark for uri. If href is NULL, unsets
the currently set icon. href can either be a full URL for the icon
file or the icon name following the Icon Naming specification.
If no bookmark for uri is found one is created.
Since 2.12
Sets the icon for the bookmark for uri. If href is NULL, unsets the currently set icon. href can either be a full URL for the icon file or the icon name following the Icon Naming specification. If no bookmark for uri is found one is created. Since 2.12