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.
Removes the logic in the course reports related to storing the last
accessed course report in a session variable as this behaviour is
no longer required.
Provide page for the reports in the course administration.
The page has a drop down to navigate to different reports.
The navigation is remembered just like the grade reports in
the course.
Signed-off-by: Sujith Haridasan <sujith@moodle.com>