Update to be fully configurable via Groovy scripting

The purpose of these changes is to allow Sectioned View Plugin to be fully configurable via Groovy scripting.

Previous to this commit both the regular expression and the job names lists were private variables without setters.  Therefore, they were inaccessible via Groovy script.

Made various updates to _hopefully_ ensure that all configuration options/fields for the Sectioned View Plugin are accessible by system Groovy scripts.