feat(directory): updated icon style

directory/src/component/dropdown.jsx

@@ -19,7 +19,7 @@ export default function Dropdown(props) {
           onClick={() => toggleDropdown()}
         >
           <span className={classes.content}>{props.text}</span>
-          <span className={classes.icon}></span>
+          <span className={classes.icon} style={props.iconStyle}></span>
           <section
             className={classes.popup}
           >
@@ -89,4 +89,5 @@ Dropdown.propTypes = {
   activeColor: PropTypes.object,
   activeRule: PropTypes.func,
   altText: PropTypes.string,
+  iconStyle: PropTypes.object,
 };

directory/src/routes/Root.jsx

@@ -296,6 +296,9 @@ function HeaderButton() {
             navigate(item.value)
           }}
           className={classes['fast-navigate']}
+          iconStyle={{
+            borderWidth: '0.1em',
+          }}
         />
       </Border>
     )