Failed to stop a running node

[xichen1]

Expected Behavior

A running node should be stopped after clicking the stop button.

Current Behavior

Error occurs, failed to stop the node

Possible Solution

The backend to operate on a node requires a payload to specify the action, but the frontend didn't call it with the payload. Instead, it used the URL parameter to specify the action.

Steps to Reproduce

1. login
2. create agent, network
3. create node and make sure it's running
4. stop the node

Possible Implementation

Make the frontend pass the action in the payload.