QTI: Option to show item max score during test

When taking a test it is normal that students know how many points can be achieved by which item. Currently this is not visible in OpenOLAT. 

The goal of this issue is to make this information available. 

ToDo: 

• Add new option to test (global setting test wide, not per item or section)
  • enabled by default
  • enabled for summative and formative profile
• Implement displaying of max score in runtime
  • Show max score in item title bar
  • Show max score also when item title is suppressed (other option