Fix false detection of posts added by updater on Tinyboard as own posts.

src/Miscellaneous/Tinyboard.coffee

@@ -6,8 +6,10 @@ Tinyboard =
         $.global ->
           {boardID, threadID} = document.currentScript.dataset
           threadID = +threadID
-          window.$(document).on 'new_post', (e, post) ->
-            postID = +post.id.match(/\d*$/)[0]
+          form = document.querySelector 'form[name="post"]'
+          window.$(document).ajaxComplete (event, request, settings) ->
+            return unless settings.url is form.action
+            return unless (postID = +request.responseJSON?.id)
             detail = {boardID, threadID, postID}
             event = new CustomEvent 'QRPostSuccessful', {bubbles: true, detail: detail}
             document.dispatchEvent event