Fixed error on generating fields on reload

WebGde/WebContent/WebGde-Widgets/DataInputWidget/generateFields.js

@@ -49,8 +49,10 @@ export async function generateFields(inputSchema, containerId) {
 
 	let doctype = sessionStorage.getItem('doctype');
 	let section = sessionStorage.getItem('section');
+	console.log('doctype:', typeof doctype);
+	console.log('section:', typeof doctype);
 
-	if (doctype == null && section == null) {
+	if ((doctype === null || doctype === "undefined") && (section === null || section === "undefined")) {
 		Object.keys(schema).every(function (key) {
 			let doctypes = schema[key];
 			let underscoredKey = key.replaceAll(" ", "_");