Use only first value in case type is an array of multiple types

Author: bhch

src/ui.js

@@ -47,7 +47,7 @@ function FormField(props) {
     if (props.schema.handler)
         inputProps.handler = props.schema.handler;
 
-    let type = props.schema.type;
+    let type = normalizeKeyword(props.schema.type);
     let choices = getKeyword(props.schema, 'choices', 'enum');
 
     if (choices) {

src/util.js

@@ -157,6 +157,9 @@ export function debounce(func, wait) {
 export function normalizeKeyword(kw) {
     /* Converts custom supported keywords to standard JSON schema keywords */
 
+    if (Array.isArray(kw))
+        kw = kw[0];
+
     switch (kw) {
         case 'list': return 'array';
         case 'dict': return 'object';