[renderjs_ui_test] Fix ListBox tests using listbox as a proxy field

bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_relation_field_zuite/testProxyListBox.zpt

@@ -197,19 +197,19 @@
 
 <tr>
   <td>waitForElementPresent</td>
-  <td>//th[@data-i18n="Title"]</td>
+  <td>//th/a[@data-i18n="Title"]</td><!-- Title is sortable -->
   <td></td>
 </tr>
 
 <tr>
   <td>verifyElementPresent</td>
-  <td>//th[@data-i18n="Title"]</td>
+  <td>//th/a[@data-i18n="Title"]</td>
   <td></td>
 </tr>
 
 <tr>
   <td>verifyElementPresent</td>
-  <td>//th[@data-i18n="Quantity"]</td>
+  <td>//th[@data-i18n="Quantity"]</td><!-- Quatity is not sortable (portal column) -->
   <td></td>
 </tr>
 

bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_translate_zuite/testListBox.zpt

@@ -24,7 +24,7 @@
 
 <tr>
   <td>waitForElementPresent</td>
-  <td>//div[@class='document_table']//th[text() = 'biaoti']</td>
+  <td>//div[@class='document_table']//th/a[text() = 'biaoti']</td>
   <td></td>
 </tr>
 

bt5/erp5_web_renderjs_ui_test/PathTemplateItem/portal_tests/renderjs_ui_translate_zuite/testRelationField.zpt

@@ -140,7 +140,7 @@
 
 <tr>
   <td>verifyElementPresent</td>
-  <td>//th[text() = 'biaoti']</td>
+  <td>//th/a[text() = 'biaoti']</td>
   <td></td>
 </tr>