don't auto refresh feeds when on metered network
check for https://docs.rs/gio/latest/gio/prelude/trait.NetworkMonitorExt.html#method.is_network_metered in the update function that is in podcasts-gtk in either app.rs or utils.rs
check for https://docs.rs/gio/latest/gio/prelude/trait.NetworkMonitorExt.html#method.is_network_metered in the update function that is in podcasts-gtk in either app.rs or utils.rs