Launch PowerShell agent in on middleware-creation

Author: levrik

packages/react-error-overlay/middleware.js

@@ -11,6 +11,11 @@
 const { launchEditor } = require('react-dev-utils/launchEditor');
 
 module.exports = function createLaunchEditorMiddleware() {
+  if (process.platform === 'win32') {
+    const { launchPowerShellAgent } = require('react-dev-utils/launchEditor');
+    launchPowerShellAgent();
+  }
+
   return function launchEditorMiddleware(req, res, next) {
     // Keep this in sync with react-error-overlay
     if (req.url.startsWith('/__open-stack-frame-in-editor')) {

packages/react-scripts/scripts/start.js

@@ -85,12 +85,6 @@ choosePort(HOST, DEFAULT_PORT)
       }
       console.log(chalk.cyan('Starting the development server...\n'));
       openBrowser(urls.localUrlForBrowser);
-      if (process.platform === 'win32') {
-        const {
-          launchPowerShellAgent,
-        } = require('react-dev-utils/launchEditor');
-        launchPowerShellAgent();
-      }
     });
 
     ['SIGINT', 'SIGTERM'].forEach(function(sig) {