Add a noAwait()

This avoids this internal compile error:
TS21225: [tsetse] All Promises in async functions must either be
                  awaited or used in an expression.

Release-Notes: skip
Change-Id: I53e84042e22cdaab6db4f5fea699df832e37ad7b
diff --git a/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread.ts b/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread.ts
index 348ea3b..30576c8 100644
--- a/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread.ts
+++ b/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread.ts
@@ -74,7 +74,7 @@
 import {createChangeUrl, createDiffUrl} from '../../../models/views/change';
 import {userModelToken} from '../../../models/user/user-model';
 import {highlightServiceToken} from '../../../services/highlight/highlight-service';
-import {waitUntil} from '../../../utils/async-util';
+import {noAwait, waitUntil} from '../../../utils/async-util';
 
 declare global {
   interface HTMLElementEventMap {
@@ -811,7 +811,7 @@
     const newReply = createNewReply(replyingTo, content, unresolved);
     if (userWantsToEdit) {
       this.getCommentsModel().addNewDraft(newReply);
-      this.editDraft();
+      noAwait(this.editDraft());
     } else {
       try {
         this.saving = true;