GW-3639

improving page-moving error displaying logic

src/client/js/components/PageRenameModal.jsx

@@ -47,6 +47,8 @@ const PageRenameModal = (props) => {
    * @param {string} value
    */
   function inputChangeHandler(value) {
+    setErrorCode(null);
+    setErrorMessage(null);
     setPageNameInput(value);
   }