Conversation Improvements by Xon 2.5.1

Fix adding a recipient to a direct message would re-index the conversation twice with XF2.3
Fix check with XF2.2 for starting a conversation without recipients

For XF2.2, require re-indexing of conversations & conversation messages!
Require StandardLib v1.21.0+
Require Search Improvements v2.16.0+
XF2.3 support
php 8.4+ compatibility fixes
Remove "Allow conversations with no one" option. XF2.3 supports this by default

• Add "silently edit" feature for editing conversation messages, requires the "edit any message" permission

• Fix edited conversation messages lacked the "Last edited:" marker after they had been edited

• Require Search Improvements v2.10.0+
• Improve how conversations are filtered out of search results when using XFES without ElasticSearch Essentials

• Fix mysql-based search support not returning conversation search results when using the conversation search tab

• When using XenForo Enhanced Search:
  • Improve reliability of indexing recipients into conversations for search
  • Improve generating constraint restricting conversations to recipients
  • If using Search Improvements v2.9.6 or earlier, ensure the option "Push "View X by others" check into XFES" is enabled.
    If it was disabled, you will need to re-index for conversation search to return results

• Fix SQL error when the last member of a conversation leaves

This add-on is now available on atelieraphelion.com

• Require php 7.2+
• Require Standard Library by Xon v1.18.0+
• Require Search Improvements v2.9.0+
• Fix viewing formatted conversation title history would not escape HTML
• Fix edit history for a conversation's title was not deleted when the conversation was
• Fix the 'Received by' search field only inspected active recipients
  • Requires re-indexing of conversations/conversation messages
  • Indexes recipients who can view a conversation and who where a member separately

• Require XenForo 2.2+
• Improve handling of leaving/joining conversation and the impact on search.
  This will require re-indexing conversation messages.
• When a user joins a conversation, ensure they can search that conversation
• If a user leaves a conversation, do not return it in search results.