Regenerate default GA campaign when typing

[MAILPOET-2398]

assets/js/src/newsletters/send.jsx

@@ -431,9 +431,20 @@ class NewsletterSend extends React.Component {
     const value = e.target.value;
     this.setState((prevState) => {
       const item = prevState.item;
+      const oldSubject = item.subject;
+      const oldGaCampaign = item.ga_campaign;
 
       item[name] = value;
 
+      if (name === 'subject') {
+        const oldDefaultGaCampaign = generateGaTrackingCampaignName(item.id, oldSubject);
+
+        // regenerate GA campaign name only if it has default autogenerated value
+        if (oldGaCampaign === oldDefaultGaCampaign) {
+          item.ga_campaign = generateGaTrackingCampaignName(item.id, value);
+        }
+      }
+
       return { item };
     });