impl Error for subsonic error and one other thing

src/subsonic.rs

@@ -30,6 +30,16 @@ impl fmt::Display for Error {
     }
 }
 
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match self {
+            Self::UrlParseError(err) => err.source(),
+            Self::ReqwestError(err) => err.source(),
+            _ => None,
+        }
+    }
+}
+
 impl From<reqwest::Error> for Error {
     fn from(err: reqwest::Error) -> Self {
         // don't print secret salt/token combo

src/ui/setup.rs

@@ -88,7 +88,7 @@ mod imp {
             match api.ping().await {
                 Ok(()) => {
                     self.obj().set_status("Connected");
-                    self.save_async().await;
+                    self.save().await;
 
                     // please REMOVEME once we've killed vala
                     fn get_random_salt(length: usize) -> String {
@@ -126,7 +126,7 @@ mod imp {
             self.obj().set_authn_can_edit(true);
         }
 
-        async fn save_async(&self) {
+        async fn save(&self) {
             self.obj().set_authn_can_edit(false);
 
             // TODO remove unwraps etc etc