Fix #198 by disabling button for 500ms after post
Fix #198 by disabling button for 500ms after post

infinity-next/infinity-next,nextchan/infinity-next,infinity-next/infinity-next,interjection/infinity-next,tmrwbo/infinity-next,nextchan/infinity-next,interjection/infinity-next,interjection/infinity-next,tmrwbo/infinity-next,nextchan/infinity-next,nextchan/infinity-next,infinity-next/infinity-next,tmrwbo/infinity-next