change tests to be compatible with the current changes

frontend/src/app/features/work-packages/components/wp-table/configuration-modal/wp-table-configuration.modal.html

@@ -23,6 +23,7 @@
   <div class="op-modal--footer">
     <button
         class="button -highlight"
+        data-qa-selector="op-modal-wp-table-configuration-save-button"
         [textContent]="text.applyButton"
         (click)="saveChanges()"
     >

modules/my_page/spec/features/my/work_package_table_spec.rb

@@ -86,7 +86,7 @@ describe 'Arbitrary WorkPackage query table widget on my page', type: :feature,
       # Actually there are two success messages displayed currently. One for the grid getting updated and one
       # for the query assigned to the new widget being created. A user will not notice it but the automated
       # browser can get confused. Therefore we wait.
-      sleep(1)
+      sleep(2)
 
       my_page.expect_and_dismiss_toaster message: I18n.t('js.notice_successful_update')
 

spec/support/components/work_packages/table_configuration_modal.rb

@@ -73,7 +73,7 @@ module Components
       end
 
       def save
-        find("#{selector} .button.-highlight").click
+        find('[data-qa-selector="op-modal-wp-table-configuration-save-button"]').click
       end
 
       def cancel