Added an admin setting which allows the administrator to set the available layouts for users and which
defaults to all layouts being available, or the card layout only if no layouts are enabled.
If only one layout is enabled, the dropdown `nav-display-selector` template will not be displayed as
it can no longer be utilised.
If the user preference is set to a layout that is no longer available, this is ignored and the first
available layout defaulted to.
Significant string changes:
* direct:view,gradeimport_direct - wording corrected from 'CSV' to
'spreadsheet'
* limitanswers_help,mod_choice - additional wording added explaining how
the setting works with groups
* pluginname,customfield_text - 'Text field' plugin renamed to
'Short text'
Added an administrator setting to set the visibility of the course category for the my overview
block on the users dashboard to support usage scenarios where displaying the course categories will
clutter course overviews.
The pagination was found to be incorrect due to the all the items event not being triggered if the amount
of courses the user has is equal to the amount set via pagination.
The condition could not just be changed to `>=` as this would trigger the event when there were further
pages to display.
A check of `remainingCourses` was added to condition so if the amount of courses on the current loaded
page is less than the pagination amount, or there are no remaining courses, the all items event is
triggered and the pagination bar hidden correctly.
This fixes some behat failures in the Classic theme,
which were caused by the default screen size obfuscating page
elements for behat, where a normal user would still be able to
identify them.
Significant string changes:
* importgroups_help,core_group - Correcting optional fieldnames
(removing picture, hidepicture and adding groupidnumber, groupingname
and enablemessaging)
* penaltyforeachincorrecttry_help,core_question - additional paragraph
about scoring logic
* resultdownloadready,tool_dataprivacy - wording corrected (no need to
go to a download page)
* auth_dbfielduser,auth_db - varchar data type requirement
