[UWMOODLE-101] Update block_wisc_ra code and establish dependency to enrol_wisc in Moodle versioning.

[Course info block changes] Moved from HTML with CSS styling to HTML styling to have consistent view in editor.  Mode changing is more obvious and user-friendly.

[WISC RA block] First stable attempt at new block split from Roster Associations.  This block handles the roster associations confirmation goal of the former RA block (roster_associations).