use confirm dialog confirm button for workflow list deletion

Author: ahmedhamidawan

lib/galaxy/selenium/navigates_galaxy.py

@@ -1959,7 +1959,7 @@ def workflow_delete_by_name(self, name):
         self.components.workflows.workflow_drop_down.wait_for_and_click()
         self.components.workflows.delete_button.wait_for_and_click()
         self.sleep_for(self.wait_types.UX_RENDER)
-        self.components._.confirm_button(name="Delete").wait_for_and_click()
+        self.components.confirm_dialog.ok_button.wait_for_and_click()
 
     def workflow_bookmark_by_name(self, name):
         self.workflow_index_search_for(name)