NOMDL edit icon at the course participants page now links to the enro…

…lments page instead of role assignment page

Also note the controlling capability has changed to the one used at the
linked page.

user/index.php

@@ -489,9 +489,9 @@
         }
         echo $OUTPUT->heading($heading, 3);
     } else {
-        if ($course->id != SITEID && has_capability('moodle/role:assign', $context)) {
-            $editlink  = ' <a href="'.$CFG->wwwroot.'/'.$CFG->admin.'/roles/assign.php?contextid='.$context->id.'">';
-            $editlink .= '<img src="'.$OUTPUT->pix_url('i/edit') . '" class="icon" alt="" /></a>';
+        if ($course->id != SITEID && has_capability('moodle/course:enrolreview', $context)) {
+            $editlink = $OUTPUT->action_icon(new moodle_url('/enrol/users.php', array('id' => $course->id)),
+                                             new pix_icon('i/edit', get_string('edit')));
         } else {
             $editlink = '';
         }