Simplify catagories and items by marking less used form elements as advanced

New users will be frustrated and established users will be annoyed by the huge selection of choices that assault teachers when they try to create or edit an item or category in the new 1.9 gradebook. I would suggest identifying the following form fields as "advanced" so that a teacher presses the "Show Advanced" button to access them.

Note that site developers can comment out any of these lines for elements that they want users to more readily change, a setting these below is a much easier process than having administrator/developers try to figure out how to implement this fix later. The given selection is my best judgment of the choices that teachers, like myself, would want most.

In grade/edit/tree/category_form.php just before the line // hidden params, add:

$mform->setAdvanced('aggregation');
$mform->setAdvanced('aggregateonlygraded');
$mform->setAdvanced('aggregatesubcats');
$mform->setAdvanced('keephigh');
$mform->setAdvanced('pref_aggregationview');
$mform->setShowAdvanced(false);//Don't use last state

In grade/edit/tree/item_form.php just before the line // hidden params, add:
$mform->setAdvanced('iteminfo');
$mform->setAdvanced('idnumber');
$mform->setAdvanced('gradetype');
$mform->setAdvanced('scaleid');
$mform->setAdvanced('grademin');
$mform->setAdvanced('gradepass');
$mform->setAdvanced('multfactor');
$mform->setAdvanced('plusfactor');
$mform->setAdvanced('display');
$mform->setAdvanced('decimals');
$mform->setAdvanced('hidden');
$mform->setAdvanced('hiddenuntil');
$mform->setAdvanced('locked');
$mform->setAdvanced('locktime');