Ensure change is WIP before firing WIP reviewer toast

Change 353134 incorrectly assumed startReview is true for active
changes, which means the toast was firing for active changes.

Check change is WIP before firing the toast.

Release-Notes: skip
Change-Id: I220177bf446da7ab82d89ee53e83940879c597f5

polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts

diff --git a/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts b/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
index 933d06f..767c4cf 100644
--- a/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
+++ b/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
@@ -1407,7 +1407,7 @@
 
     if (startReview) {
       reviewInput.ready = true;
-    } else {
+    } else if (this.change?.work_in_progress) {
       const addedAccounts = [
         ...(this.reviewersList?.additions() ?? []),
         ...(this.ccsList?.additions() ?? []),