fix/#782_openai_checklist_button_does_not_work_on_second_tab (#795)

* fix custom tab not shown

* remove unused code

modules/checklists/assets/js/global-checklists.js

@@ -228,7 +228,8 @@
         $suggestionsObject = objectL10n_checklists_global_checklist[type + '_suggestions'],
         rule;
 
-      $table.append($tr);
+      $table.find('tbody#pp-checklists-tab-body-' + post_type).append($tr);
+      $table.find('tr.ppch-custom-group:contains("No custom requirements for this post type.")').hide();
 
       $tr
         .addClass('pp-checklists-requirement-row')
@@ -337,8 +338,6 @@
 
     /*----------  Custom items  ----------*/
     $('#pp-checklists-add-button').on('click', function (event) {
-      //hide all tabs contents, and show Custom tab
-      $('.pp-checklists-requirement-row').hide();
       $('.ppch-custom-group').show();
 
       var newId = uidGen(15);
@@ -363,7 +362,7 @@
       //add active class to current tab
       $(this).addClass('active');
 
-      //hide all tabs contents
+      // hide all tabs contents
       $('.pp-checklists-requirement-row').hide();
 
       // Show the current tab contents that also have the matching data-post-type attribute
@@ -372,8 +371,6 @@
 
     /*----------  OpenAI items  ----------*/
     $('#pp-checklists-openai-promt-button').on('click', function (event) {
-      //hide all tabs contents, and show Custom tab
-      $('.pp-checklists-requirement-row').hide();
       $('.ppch-custom-group').show();
 
       var newId = uidGen(15);