MAGETWO-54501: Incorrect position of the calendar button in the widget conditions

Author: undefined-olha

app/design/adminhtml/Magento/backend/web/css/styles-old.less

@@ -3793,6 +3793,10 @@
         border-left: none !important;
     }
 
+    .rule-tree ._has-datepicker + .ui-datepicker-trigger {
+        position: static;
+    }
+
     .rule-param .label {
         color: #000;
         float: none;