api: add ChatListChanged and ChatListItemChanged events (#4476)

deltachat-jsonrpc/src/api.rs

@@ -1626,6 +1626,9 @@ impl CommandApi {
     /// the current device.
     ///
     /// Can be cancelled by stopping the ongoing process.
+    ///
+    /// Do not forget to call start_io on the account after a successful import,
+    /// otherwise it will not connect to the email server.
     async fn get_backup(&self, account_id: u32, qr_text: String) -> Result<()> {
         let ctx = self.get_context(account_id).await?;
         let qr = qr::check_qr(&ctx, &qr_text).await?;