MAGETWO-46726: Slide-out panel contains scroll bars available for bottom layers

- Done code style

Author: Oleksandr Dubovyk

app/design/adminhtml/Magento/backend/web/css/source/components/_modals_extend.less

@@ -158,8 +158,8 @@
 .modal-slide {
     .modal-content-new-attribute {
         overflow: auto;
-        -webkit-overflow-scrolling: touch;
         padding-bottom: 0;
+        -webkit-overflow-scrolling: touch;
 
         iframe {
             margin-bottom: -@indent__m;