MAGETWO-89675: Build Stabilization

Change .admin__action-multiselect-empty-area to text-align: center

Author: danmooney2

app/design/adminhtml/Magento/backend/web/css/source/actions/_actions-multiselect.less

@@ -201,7 +201,7 @@
     color: @color-gray65-almost;
     padding-top: 20px;
     padding-bottom: 20px;
-    text-align: -webkit-center;
+    text-align: center;
     vertical-align: middle;
 }