Create or update the breadcrumbs in the site administration
pages where it is required.
Highlight the corresponding site adminstration tab.
Highlight the primary nav to Site administration when user
is navigating to any of the site administration pages.
Also changed the boostnavbar so that the nodes in the secondary
navigation are not shown in the breadcrumbs when user is in site
administration page.
- Add help for 'payment account' field in the enrol instance form
- Remove MOODLE_INTERNALs when not necessary
- Add $userid to deliver_order
- Check if provider classes implement the provider interface
- Rename get_cost to get_payable
- get_payable returns payable object
- Improve registerEventListeners and added init
- Rename payment\provider to payment\service_provider
Also create the infrastructure to let components know when they have to
deliver what they sold. We are going to use namespace functions instead
of traditional callbacks.
