Implement separate History settings in Client Control

Currently Client Control plugin's setting "History Settings" not just hides the history settings, but also disables the history in Spark. Which might not be desired. One might need to have history, but hide settings, so users won't be able to disable it from a GUI. This change will implement two separate history features in Client Control - "History Settings" and "History Transcripts". Now an admin can select to enable/disable the history controls as well as enable/disable the logging of the history into transcript files. NOTE: This is updated version 2.1.2 of the Client Control plug-in and requires a minimum of Spark version 2.9.0 for proper functionality.