Change Log

• Fixes a faulty comparison when checking for an open thread (the comparison was fine for PHP versions earlier than 8).
  
• The "[Open/Close] Thread" button is now shown even to admins/mods who can already close threads, provided that they are picked out by the plugin's settings as for any other usergroup. This reverts the change made in v1.1.1 (commit 4853a5) and closes GitHub issue #4. Thanks to @Eldenroot, @lkop, and @HLFadmin for your advice that this was a desirable change to make.