Add status and visibility to assessment bulk gradingworkflow

In the assessment tool a bulk assessment wizard allows grading of many people at once in a simple way.

In recent releases, the assessment data model added features for grading status and visibility of grading results to students. Those changes have not been incorporated into the wizard with the effect that after bulk-grading works only partially 

The goal of this issue is to add the missing status and visibility to the bulk assessment workflow. 

A problem is that the bulk assessment workflow should also trigger the "Accept submission" action in case the course element is of type task. This should be taken into consideration during implementation