accounts: keep event emitter from closing when there are no accounts (#2636)

src/events.rs

@@ -62,6 +62,10 @@ impl Events {
 pub struct EventEmitter(Receiver<Event>);
 
 impl EventEmitter {
+    pub(crate) fn into_inner(self) -> Receiver<Event> {
+        self.0
+    }
+
     /// Blocking recv of an event. Return `None` if the `Sender` has been droped.
     pub fn recv_sync(&self) -> Option<Event> {
         async_std::task::block_on(self.recv())