Display: Change edit icon for settings icon in exercise result for teachers

main/exercise/exercise_result.php

@@ -99,7 +99,7 @@ if (api_is_course_admin() && !in_array($origin, ['learnpath', 'embeddable'])) {
                 'admin.php?'.api_get_cidreq().'&exerciseId='.$objExercise->id
             )
             .Display::url(
-                Display::return_icon('edit.png', get_lang('ModifyExercise'), [], 32),
+                Display::return_icon('settings.png', get_lang('ModifyExercise'), [], 32),
                 'exercise_admin.php?'.api_get_cidreq().'&modifyExercise=yes&exerciseId='.$objExercise->id
             ),
         ]