Spamming the Post Reply and Post Discussion Button causes multiple copies of same content

[Trigon1015]

1. account used: test_user_2
2. Spamming the Post Reply and Post Discussion Button causes multiple copies of same content
   
   
3. Go to the discussion page and post a discussion, try to click the post discussion button quickly multiple times before it posts the discussion. And then try to post a reply. When clicking the Post Reply button, try to click it quickly multiple times before it posts the reply.
4. There should be a check condition to see if the reply is posting(same for discussion post), if it is, the post reply button should be temporarily disabled to avoid being triggered multiple times. After the reply is posted successfully, re-enable the post reply button.