MDL-63186 workshopform_numerrors: Move percents lang string to core

Moved 'percents' lang string from workshopform_numerrors to core_moodle.

AMOS BEGIN
 MOV [percents,workshopform_numerrors],[percents,core_moodle]
AMOS END

Part of MDL-62610

lang/en/moodle.php

@@ -1512,6 +1512,7 @@
 $string['paymentsorry'] = 'Thank you for your payment!  Unfortunately your payment has not yet been fully processed, and you are not yet registered to enter the course "{$a->fullname}".  Please try continuing to the course in a few seconds, but if you continue to have trouble then please alert the {$a->teacher} or the site administrator';
 $string['paymentthanks'] = 'Thank you for your payment!  You are now enrolled in your course:<br />"{$a}"';
 $string['pendingrequests'] = 'Pending requests';
+$string['percents'] = '{$a} %';
 $string['periodending'] = 'Period ending ({$a})';
 $string['perpage'] = 'Per page';
 $string['perpagea'] = 'Per page: {$a}';

mod/workshop/form/numerrors/edit_form.php

@@ -88,14 +88,14 @@ protected function definition_inner(&$mform) {
         $percents = array();
         $percents[''] = '';
         for ($i = 100; $i >= 0; $i--) {
-            $percents[$i] = get_string('percents', 'workshopform_numerrors', $i);
+            $percents[$i] = get_string('percents', 'moodle', $i);
         }
-        $mform->addElement('static', 'mappingzero', 0, get_string('percents', 'workshopform_numerrors', 100));
+        $mform->addElement('static', 'mappingzero', 0, get_string('percents', 'moodle', 100));
         for ($i = 1; $i <= $totalweight; $i++) {
             $selects = array();
             $selects[] = $mform->createElement('select', 'map__idx_'.$i, $i, $percents);
             $selects[] = $mform->createElement('static', 'mapdefault__idx_'.$i, '',
-                                        get_string('percents', 'workshopform_numerrors', floor(100 - $i * 100 / $totalweight)));
+                                        get_string('percents', 'moodle', floor(100 - $i * 100 / $totalweight)));
             $mform->addGroup($selects, 'grademapping'.$i, $i, array(' '), false);
             $mform->setDefault('map__idx_'.$i, '');
         }

mod/workshop/form/numerrors/lang/en/workshopform_numerrors.php

@@ -38,7 +38,6 @@
 $string['grade1default'] = 'Yes';
 $string['maperror'] = 'Weighted number of errors is less than or equals';
 $string['mapgrade'] = 'Grade for submission';
-$string['percents'] = '{$a} %';
 $string['pluginname'] = 'Number of errors';
 $string['privacy:metadata'] = 'The Number of errors plugin only stores the details of the assessment form. Actual personal data of how the form has been filled are stored by the Workshop module itself and are attached to exported assessments.';
 $string['privacy:export:metadata:map'] = 'If the weighted number of errors reaches {$a->nonegative} then the grade is {$a->grade} percents.';