Update Admin-UI Documentation

[eengelking]

Add documentation to cover the following Admin-UI topics:

Home

• Explain the Session Statistics page.

Dashboards

• Explain the Active Events section.
• Explain the Finished Events section.

ScheduledEvents

• Add how-to for creating Scheduled Events.
• Add how-to for managing existing Scheduled Events.

Content Management

• Explain the difference between a Scenario and a Course.
• Explain the Scenarios page.
  • Categories
  • Add new Scenarios.
  • In-depth documentation on Steps with examples.
    • Show integration with tabs.
• Explain the Courses page.
  • Add new Course.
  • Explain how dynamic scenarios work with examples.

Users

• How to add users when the registration page is disabled.
  • How to bulk-add users.
• Update passwords
• Add/remove access codes
• Add/remove role bindings / admin rights
• Delete a user.