Script Summary: Adds a button to the right of the Save changes button. Press it, write the number of the BotD and let the post be auto updated by the script.
How does it work:
1)Go to the topic page
2)Press the 'edit' button on your post
3)Wait for the 'update' button to appear
4)Click the 'update' button
5)Write the number of the BotD that will appear at the left of the badge date in the post.
6)Check if the post was updated succesfully; if there is something that seems wrong, refresh the page and try again.
Sometimes there is something wrong with the connection or with the formatting and the script fails. Personally I can't fix that because I don't know exactly how is the post formatted but generally by refreshing the page the problem is solved. If the problem keeps going contact me, and I'll try to fix it.
Hope you like the script! ;)