* The activity link is now always it's view.php page;
* The user fields in the grader report are now initially sorted via the
cell action menu (ascending/descending).
get_gradable_users now has extra param to retrieve only active
users. Grade reports hase their own grade_report::get_gradable_users
since they decided whether to inlcude active users from report preferences
Deprecates the select_in_gradebook_navigation_selector() function in
behat_grade.php and removes all usages. The select menu field supports
the same functionality and this function can be simply replaced with
behat_forms::i_set_the_field_to().
The parameters $exportactiveurl and $importactiveurl are removed from
export_action_bar and import_action_bar classes. Not only passing them
were redundant and it was possible to generate them by having
$activeplugin (also passed to the mentioned class constructors), but
also we had a bug there. The value of $PAGE->url was passed as those
parameters, but $PAGE->url can sometimes include additional parameters
and as a result, its value may not match any of the available
export/import plugins.
Deprecates the function select_in_gradebook_tabs() in behat_grade.php.
After the tertiary navigation changes in gradebook this function became
obsolete and is now replaced by select_in_gradebook_navigation_selector().
The $CFG->grade_navmethod setting has been removed because it is not
required anymore. This setting was used to set the type of navigation
(tabs or dropdown box) which will be used in gradebook. However, these
navigation methods are no longer used and replaced with tertiary
navigation.
The functions grade_print_tabs() and print_grade_plugin_selector()
can be deprecated as they are no longer used. These functions were
used to generate and output the tabs and dropdown box navigation
in gradebook which is now replaced with tertiary navigation.
Added groupid to grade_plugin_return tracking, modified constructor
to use query params as defaults if passed-in params not supplied,
used groupid tracking in core reports.
grade_get_graded_users_select also fixed to use gpr (otherwise using
it breaks when course current group has changed between render and
submit).
Fixed coding style issue in gpr constructor & documented properties.
Added upgrade.txt noting gpr changes.
