Update the secondary navigation view to send site administration information in tab form.

This is hard to test. Setup: Pull in the branch https://github.com/peterRd/moodle/tree/MDL-70888-master_bas_changes_1  which includes Bas' changes from 70888 and this patch. git pull https://github.com/peterRd/moodle MDL-70888 -master_bas_changes_1 Alternately, if any conflicts pop up, checkout the branch git fetch  https://github.com/peterRd/moodle MDL-70888 -master_bas_changes_1 git checkout FETCH_HEAD Testing instructions: Go to the Site admin by entering the following in the address bar{{ http://master/admin/index.php }} When in site administration on the main index page, open up the browser inspector Inspect the tabs Confirm they have anchors in their href attrib.  Click on the nested setting pages Confirm they redirect to the correct page Confirm the secondary nav(the tabs on the site admin page) now show up as links with the anchors appended. e.g. if you're on http://master/admin/settings.php?section=analyticssite , the tabs now have links e.g. Site Administration - http://master/admin/search.php#linkroot Click on the different tabs Confirm they redirect correctly to the relevant page(site admin index/search page) and the corresponding tab. Note: Replace 'master' with your localhost