ElasticSearch Essentials 3.16.5

• Fix "Limit autocomplete results by:Exclude this forum" could be inconsistently non-effective for non-public forums for members
• Ensure autocomplete restrictions list cache is reset on add-on rebuild
• Ensure autocomplete restrictions list cache is reset when changing what content types are enrolled into autocomplete

• Restore XF 2.1 support
• Fix a failed search suggestion would erase the original search query text
• Improve "search suggestions" feature would suggest bad results which didn't really exist due to an inexact query
• Remove "Validate Suggestions" option, and always do this by default to avoid suggesting bad search terms

• Require StandardLib v1.20.0+
• If installed, require Redis Cache v2.17.0+
• If installed, require Redis View Counters v2.4.0+
• php 8.4 compatibility fixes
• Fix bulk search when using XF2.3, note; add-on is not fully XF2.3 compatible yet
• Fix autocomplete results could return less results than expected when "view others" permission for threads or tickets wasn't granted

• Fix auto-complete would not discover from dbtech eCommerce products in nested categories

• Change autocomplete to exclude XFRM Resource discussion threads, and only return the resource itself
  When triggering autocomplete for just threads the discussion thread can be returned.

• Prevent "did you mean?" suggestions and autocomplete from sending search terms >200 characters into the search backend as this could trigger server errors

• Fix moderator "Include deleted" search preference not being injected when "Search Options" preference section added by Search Improvements

• Update "Search first posts only" phrase & style property to "Search titles and first posts only" to match Search Improvements
• Change 'search only x' phrase to 'search x only' to match XF
• Fix searchcontent bb-code from Advanced Bb-codes pack attempting to set the search order did not work

• Fix "Invalid argument supplied for foreach()" when using the XFES widget and the option "Replace Enhanced Search 2.2's suggest threads implementation" when similar threads finds no results

• Workaround XF bug where searching by a list of prefixes could cause the search to unexpectedly fail.
• Fix XFES similar thread widget when "Replace Enhanced Search 2.2's suggest threads implementation" option was enabled would not show results on the first view