FEATURE: Add option to delete all replies of flagged post

app/controllers/posts_controller.rb

@@ -259,6 +259,11 @@ class PostsController < ApplicationController
     render json: post.reply_ids(guardian).to_json
   end
 
+  def all_reply_ids
+    post = find_post_from_params
+    render json: post.reply_ids(guardian, only_replies_to_single_post: false).to_json
+  end
+
   def destroy
     post = find_post_from_params
     RateLimiter.new(current_user, "delete_post", 3, 1.minute).performed! unless current_user.staff?