Fix some problems with class and className

src/List.tsx

@@ -9,6 +9,7 @@ export default function List({
    clickable,
    divider,
    className,
+   class: c,
    children,
    ...props
 }: JSX.HTMLAttributes<HTMLUListElement> & IListProps) {
@@ -18,7 +19,7 @@ export default function List({
    if (divider) cl += "ht-list-divider ";
 
    return (
-      <ul className={cl + (className || "") + (props.class || "")} {...props}>
+      <ul className={cl + (className || "") + c} {...props}>
          {children}
       </ul>
    );