Merge #1234: fix wrong datadir in app cache using remote backend

8610afe fix wrong datadir in app cache using remote backend (edouardparis)

Pull request description:

  Detected after Manuel failed to have in cache the correct the refresh token. It was not correctly stored after 1h in the settings file because of the wrong datadir.

ACKs for top commit:
  edouardparis:
    Self-ACK 8610afe

Tree-SHA512: 7bb6f1281d4642927dbb4a10183e5551a93137ca5e6cea09b906e23a3789684070fd00395aabe4711205db74ffad715ee8ba5bf7e728bf8c2b8327e3b9c5c329

gui/src/main.rs

@@ -480,7 +480,7 @@ pub fn create_app_with_remote_backend(
             network: bitcoin::Network::Signet,
             coins: Vec::new(),
             rescan_progress: None,
-            datadir_path: default_datadir().unwrap(),
+            datadir_path: datadir.clone(),
             blockheight: wallet.tip_height.unwrap_or(0),
         },
         Arc::new(