Made keyword search classes use ingest job settings

Added a KeywordSearchJobSettings class and adapted the keyword search ingest module factory, ingest module, and job settings panels to its use. Established notification via property changes of settings changes so that global and job settings panels stay in synch. Temporarily disabled the injection of new search lists into an ongoing ingest, since a mechanism for doing so correctly no longer exists.

The effort included renaming of classes to clarify use and intent.