MDL-46658 gradereport_grader: Remove old scrollview code
MDL-46774 gradereport_grader: Move row/column highlight code to YUI module
MDL-46731 gradereport_grader: Move tooltips to YUI module
MDL-46772 core: html_writer::table should respect tr attributes
MDL-46658 gradereport_grader: Add user picture back to UI
MDL-46776 assignment: Add generation of assignments to the course generator