feat(navigation): hard-switch to Zibll navigation and Font Awesome 5

inc/helpers/aksrt-i18n-header.php

@@ -54,5 +54,5 @@ function aksrt_get_translate_language_btn(string $class = ''): string {
 	$toggle = !$is_mobile ? '' : ' data-toggle="dropdown"';
 	return '<div class="dropdown language-dropdown ' . esc_attr($class) . $hover . '">'
 		. '<a href="javascript:;" class="toggle-radius"' . $toggle . ' title="' . esc_attr__('切换语言', 'aksrt') . '">'
-		. '<i class="fas fa-language" aria-hidden="true"></i></a>' . $dropdown . '</div>';
+		. '<i class="fa fas fa-language" aria-hidden="true"></i></a>' . $dropdown . '</div>';
 }