ElasticSearch Essentials 3.15.9

• 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

• Fix similar thread's suggest limit would be ignored (and default to "all" visible forums) if a subforum was marked to be excluded from similar threads

• Fix various numerical options which did not step in the incremental values as intended, while allowing arbitrary values in the range to be entered
• Fix redundant queries being triggered when using XFES widget when "Replace Enhanced Search 2.2's suggest threads implementation" is set
• Fix setting similar thread cache time to 0 didn't disable caching
• Improve backend for similar thread widget to be more extendable, to be used in searchcontent bb-code in Advanced Bbcode pack add-on

• Recommend Search Improvements v2.10.0+
• Remove redundant template modification as Search Improvements is required
• Simplify how Report Improvements report/warning search results are filtered, as that add-on now does much of that

• Remove how this add-on enriches member search with search arguments, as SV/SearchImprovements has replaced this feature with a better version

• Support @NixFifty's Tickets v2.6.0+

• Require Search Improvements v2.9.0+
• Require Standard Library by Xon v1.18.0+
• If installed, require Report Improvements v2.14.0+
• Add caching to auto-complete hot-path to avoid fetching the entire category list for various supported types
• Fix phrase 'include deleted' phrase being re-used in separate contexts (ie for translation purposes)
• Fix ajax on the advanced search form was disabled when the showing suggestions on few results was enabled. Really this time.