add css btn question return CT#8122

app/Resources/public/css/base.css

@@ -1866,13 +1866,20 @@ div.admin_section h4 {
   box-shadow: 0px 1px 1px rgba(0,0,0,0.05);
   margin-bottom: 35px;
 }
-
+.question_row_score{
+    margin-bottom: 20px;
+    display: block;
+}
 .question_item {
     height:50px;
     padding:5px;
     margin:10px 0px 10px 0px;
 }
-
+.question-return{
+    padding: 10px;
+    text-align: center;
+    margin-bottom: 20px;
+}
 .option_item {
     width:150px;
     padding:3px;

main/exercice/exercise_result.php

@@ -168,12 +168,13 @@ ExerciseLib::exercise_time_control_delete(
 ExerciseLib::delete_chat_exercise_session($exe_id);
 
 if ($origin != 'learnpath') {
-    echo '<hr>';
+    echo '<div class="question-return">';
     echo Display::url(
         get_lang('ReturnToCourseHomepage'),
         api_get_course_url(),
         array('class' => 'btn btn-primary')
     );
+    echo '</div>';
 
     if (api_is_allowed_to_session_edit()) {
         Session::erase('objExercise');