fix checkbox legacy support issue

lib/ui/checkbox.js

@@ -56,7 +56,8 @@ function resolveCheckbox(container, legacy) {
     if (legacy) {
         const checks = container.querySelectorAll('input[type="checkbox"]');
         for (let chk of checks) {
-            if (chk.parentElement.querySelector('layer.check-box-inner') != null) {
+            if (chk.parentElement.classList.contains('checkbox-wrapper')) {
+                // skip
                 continue;
             }
             const id = chk.id;