Put dbus dependency behing `dbus-notifications` feature.
3 notifications evenly spread per second did not make any sense. Increase it to 1000 and see if it's ok
Merge ui crate with root crate. In preparation for uploading `meli` as a separate crate on crates.io. Workspace crates will need to be published as well and having a separate `ui` crate and binary perhaps doesn't make sense anymore.
Manos Pitsidianakis