Add translation for grading header

Fixes #322

grade.php

@@ -78,7 +78,7 @@ new \mod_hvp\event(
 // Set page properties.
 $pageurl = new moodle_url('/mod/hvp/grade.php', array('id' => $hvp->id));
 $PAGE->set_url($pageurl);
-$title = "Results for {$hvp->title}";
+$title = get_string('gradeheading', 'hvp', $hvp->title);
 $PAGE->set_title($title);
 $PAGE->set_heading($course->fullname);
 

lang/en/hvp.php

@@ -477,3 +477,4 @@ $string['completionpassdesc'] = 'Student must achieve a passing grade to complet
 $string['completionpass_help'] = 'If enabled, this activity is considered complete when the student receives a pass grade (as specified in the Grade section of the H5P activity settings) or higher.';
 $string['gradetopassnotset'] = 'This H5P activity does not yet have a grade to pass set. It may be set in the Grade section of the H5P activity settings.';
 $string['gradetopassmustbeset'] = 'Grade to pass cannot be zero as this H5P activity has its completion method set to require passing grade. Please set a non-zero value.';
+$string['gradeheading'] = 'Results for {$a}';
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