Creates a report slide with a section break.
system_report_slide_section(cfg, title = "Title", sub_title = NULL,
rptname = "default")ubiquity system object
string with slide title ("Title")
string with slide sub title (NULL)
report name initialized with system_report_init
ubiquity system object with slide added to report
system_report_init and the reporting vignette (vignette("Reporting", package = "ubiquity"))