Timeout for Alice waiting for ack for sending transfer proof

If dialing Bob fails Alice waits for the acknowledgement of the transfer proof indefinitely.
The timout prevents her execution from hanging.
Added a ToDo to re-visit the ack receivers. They don't add value at the moment and should be removed.

swap/src/protocol/alice/steps.rs

@@ -96,6 +96,7 @@ pub async fn lock_xmr<W>(
     state3: alice::State3,
     event_loop_handle: &mut EventLoopHandle,
     monero_wallet: Arc<W>,
+    execution_params: ExecutionParams,
 ) -> Result<()>
 where
     W: Transfer,
@@ -117,9 +118,13 @@ where
     //  Otherwise Alice might publish the lock tx twice!
 
     event_loop_handle
-        .send_transfer_proof(bob_peer_id, TransferProof {
-            tx_lock_proof: transfer_proof,
-        })
+        .send_transfer_proof(
+            bob_peer_id,
+            TransferProof {
+                tx_lock_proof: transfer_proof,
+            },
+            execution_params,
+        )
         .await?;
 
     Ok(())