Option to hide user score change log and info button in assessable course node

For some settings the user score change log is not desired to be shown to the learners. A global configuration is implemented to hide it.

To-do

• Implement new admin module "Course"
• Implement option to hide user change log
• Implement option to hide info box above the start button
• Check all assessable course elements where the two options are displayed
• Hide the two elements when disabled

The change log is always displayed in the assessment tool, regardless of the configuration.