Documentation on User Action Category link would be great against the category definition

• I click on User Action Category
• I create a new User Action
• Into the popup it would be great to have the question mark to let me understand the notion of category with a following link:
  http://doc.nuxeo.com/display/Studio/About+workflows+and+business+logic#Aboutworkflowsandbusinesslogic-Useractions

And it would be great also to have the previous link into the form of the user action against the user action definition.