[ZEPPELIN-6047] add setConfig method to action-bar.component.ts (#4771)

diff --git a/zeppelin-web-angular/src/app/pages/workspace/notebook/action-bar/action-bar.component.ts b/zeppelin-web-angular/src/app/pages/workspace/notebook/action-bar/action-bar.component.ts
index 9ec5ded..f76b5ff 100644
--- a/zeppelin-web-angular/src/app/pages/workspace/notebook/action-bar/action-bar.component.ts
+++ b/zeppelin-web-angular/src/app/pages/workspace/notebook/action-bar/action-bar.component.ts
@@ -163,8 +163,12 @@
     this.setConfig();
   }
 
-  setConfig() {
-    // TODO(hsuanxyz)
+  setConfig(config?: Note['note']['config']) {
+    if (config) {
+      this.note.config = config;
+    }
+
+    this.messageService.updateNote(this.note.id, this.note.name, this.note.config);
   }
 
   cloneNote() {