add getSetByQr

public/scripts/extensions/quick-reply/api/QuickReplyApi.js

@@ -23,6 +23,14 @@ export class QuickReplyApi {
 
 
 
+    /**
+     * @param {QuickReply} qr
+     * @returns {QuickReplySet}
+     */
+    getSetByQr(qr) {
+        return QuickReplySet.list.find(it=>it.qrList.includes(qr));
+    }
+
     /**
      * Finds and returns an existing Quick Reply Set by its name.
      *