message: Catch console log messages from SafeWebView
  This simplifies debugging of the content loaded by Etcher,
  including analysis of loaded analytics libraries.
  Changelog-entry: Catch console log messages from SafeWebView
  Change-type: patch
diff: @@ -107,9 +107,14 @@ class SafeWebview extends react.PureComponent {
  this.didFailLoad = _.bind(this.didFailLoad, this)
  this.didGetResponseDetails = _.bind(this.didGetResponseDetails, this)
  + const logWebViewMessage = (event) => {
  + console.log('Message from SafeWebview:', event.message);
  + };
  +
  this.eventTuples = [
  [ 'did-fail-load', this.didFailLoad ],
  - [ 'new-window', this.constructor.newWindow ]
  + [ 'new-window', this.constructor.newWindow ],
  + [ 'console-message', logWebViewMessage ]
  ]
  // Make a persistent electron session for the webview
  