Prevent needless retention of node status messages

packages/node_modules/@node-red/runtime/lib/flows/Subflow.js

@@ -18,6 +18,7 @@ const clone = require("clone");
 const Flow = require('./Flow').Flow;
 const context = require('../nodes/context');
 const util = require("util");
+const events = require("../events");
 
 const redUtil = require("@node-red/util").util;
 const flowUtil = require("./util");
@@ -308,7 +309,26 @@ class Subflow extends Flow {
         super.start(diff);
     }
 
+    /**
+     * Stop this subflow.
+     * The `stopList` argument helps define what needs to be stopped in the case
+     * of a modified-nodes/flows type deploy.
+     * @param  {[type]} stopList    [description]
+     * @param  {[type]} removedList [description]
+     * @return {[type]}             [description]
+     */
+    stop(stopList, removedList) {
+        const nodes = Object.keys(this.activeNodes);
+        return super.stop(stopList, removedList).then(res => {
+            nodes.forEach(id => {
+                events.emit("node-status",{
+                    id: id
+                });
+            })
+            return res;
+        })
 
+    }
     /**
      * Get environment variable of subflow
      * @param {String}   name   name of env var