Fixes labels duplicating themselves across lalbe inputs when unsaved

no issue

- Unsaved labels were still persisted in the store. This was causing unsaved labels reappearing on different instances and caused broken states

ghost/admin/app/components/gh-member-label-input.js

@@ -34,6 +34,16 @@ export default Component.extend({
         this.set('_availableLabels', this.store.peekAll('label'));
     },
 
+    willDestroyElement() {
+        // NOTE: cleans up labels store in case they were not persisted, this avoids unsaved labels
+        //       from appearing on different input instances when unsaved
+        this.get('_availableLabels').forEach((label) => {
+            if (label.get('isNew')) {
+                this.store.deleteRecord(label);
+            }
+        });
+    },
+
     actions: {
         matchLabels(labelName, term) {
             return labelName.toLowerCase() === term.trim().toLowerCase();

ghost/admin/app/controllers/members.js

@@ -165,11 +165,7 @@ export default class MembersController extends Controller {
 
     @task
     *fetchLabelsTask() {
-        if (!this._hasLoadedLabels) {
-            yield this.store.query('label', {limit: 'all'}).then(() => {
-                this._hasLoadedLabels = true;
-            });
-        }
+        yield this.store.query('label', {limit: 'all'});
     }
 
     @task({restartable: true})