[UW] Forum Comments System 1.8.17

Change log

🔹 When comments are moved now also the reactions in those comments are preserved.

🔹From moved comments, converted to replies, the arrow link was removed.

🔸while trying to copy comments an error was generated, so this was fixed.

🔸When a thread was set to not allow new posts, a comment link still appeared on comments.
So this was fixed.

🔸Usually links are unfurled for all users in posts/replies but when a guest posts a link in a comment, just the URL showed.
So this was fixed.