* [Virtual Attendants/Simulator/Comments] When simulating Virtual Attendant behaviors on the 'New comment on a conversation in group' event, the sample comments will now always be related to the target ticket.  Previously, the random sample comment could come from anywhere.
* [CHD-3698] [Virtual Attendants/Simulator] Improved the "Invalid placeholders" error message when simulating a 'New comment on conversation in group' behavior with the 'comment_record_watchers_email' placeholder and the comment's record has no watchers.  The error now reads "No recipients", which is more explanatory.
* [CHD-3699] [Search/Performance/Usability] The quick search on fulltext fields (e.g. Message content, Comment content) now defaults to using a single phrase unless quotes are explicitly provided.  Previously, a non-quoted sentence would be treated as individual terms using an 'OR' search, which was intensive and often returned results with low relevancy.  This most often happened when searching for people and organization names.  Workers shouldn't have to remember to add quotes, so the new default behavior should improve performance, usability, and relevance.
6.6.4-release checkpoint
Merge branch '6.6.4' into stable