MAGETWO-53527: [Github] Sign in modal overlay in checkout page (iPad 2) #4083

Author: omiroshnichenko

app/design/frontend/Magento/blank/Magento_Checkout/web/css/source/module/checkout/_authentication.less

@@ -130,16 +130,21 @@
         position: absolute;
         text-align: left;
         top: 100%;
-        transform: scale(1,0);
-        transform-origin: 0 0;
-        transition: transform linear .1s, visibility 0s linear .1s;
+        -webkit-transform: scale(1,0);
+                transform: scale(1,0);
+        -webkit-transform-origin: 0 0;
+                transform-origin: 0 0;
+        -webkit-transition: -webkit-transform linear .1s, visibility 0s linear .1s;
+                transition: transform linear .1s, visibility 0s linear .1s;
         visibility: hidden;
         width: 100%;
 
         &._show {
             .lib-css(z-index, @dropdown-list__z-index);
-            transform: scale(1,1);
-            transition: transform linear .1s, visibility 0s linear 0s;
+            -webkit-transform: scale(1,1);
+                    transform: scale(1,1);
+            -webkit-transition: -webkit-transform linear .1s, visibility 0s linear 0s;
+                    transition: transform linear .1s, visibility 0s linear 0s;
             visibility: visible;
         }
     }