fix Thread Stats bug

src/Monitoring/ThreadStats.coffee

@@ -40,7 +40,7 @@ ThreadStats =
     if Conf['Updater and Stats in Header']
       Header.rmShortcut @dialog
     else
-      $.rm d.body, sc
+      $.rm @dialog
 
     clearTimeout @timeout # a possible race condition might be that this won't clear in time, but the resulting error will prevent issues anyways.
 
@@ -49,6 +49,7 @@ ThreadStats =
     delete @postCountEl
     delete @fileCountEl
     delete @pageCountEl
+    delete @dialog
 
     Thread.callbacks.disconnect 'Thread Stats'
     $.off d, 'ThreadUpdate', ThreadStats.onUpdate
@@ -81,4 +82,4 @@ ThreadStats =
       for thread in page.threads when thread.no is ThreadStats.thread.ID
         ThreadStats.pageCountEl.textContent = page.page
         (if page.page is @response.length - 1 then $.addClass else $.rmClass) ThreadStats.pageCountEl, 'warning'
-        return
+        return