Studio: revises layout for success step and actions in import view

cms/static/sass/views/_import.scss

@@ -157,16 +157,8 @@
         // CASE: has actions
         &.has-actions {
 
-          .status-detail {
-            width: flex-grid(5,9);
-          }
-
           .list-actions {
             display: none;
-            width: flex-grid(3,9);
-            float: right;
-            margin-left: flex-gutter();
-            text-align: right;
 
             .action-primary {
               @extend %btn-primary-blue;

cms/templates/import.html

@@ -111,13 +111,13 @@
               <div class="status-detail">
                 <h3 class="title">${_("Success")}</h3>
                 <p class="copy">${_("Your imported content has now been integrated into this course")}</p>
-              </div>
 
                 <ul class="list-actions">
                   <li class="item-action">
                     <a href="${successful_import_redirect_url}" class="action action-primary">${_("View Updated Outline")}</a>
                   </li>
                 </ul>
+              </div>
             </li>
           </ol>
         </div>