This page appears to be broken and I'm not sure what exactly it should do. You can see the issue by going to demo.plone.org and putting some content in the Pending state. If you also add a Review Portlet you will see a link to Full Review List, or just go to demo.plone.org
Despite having checkboxes for each item, there are no buttons by default. This is because it is looking for actions in the folder_buttons section. If you have a migrated site you will get these, but a new 6 site does not have this category created. The only button that appears to work on migrated 5 sites is the Change Workflow one. Cut/copy/paste/delete have actions string:folder_copy:method (etc) and return a 404.
I think this form should probably not rely on folder_buttons, or those actions should be created in a default 6 site. Is there even a valid action for cut/copy/paste/delete we can change too?