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 "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