Button Selector - Properties: Manage the properties of a button selector.
  
  Description

    View and manage the properties of a Button Selector. 

  Controls

    Meta Type list allows choosing which "Add <i>meta type</i>" buttons
    will apear in ZMI interface. It's possible to choose multiple types
    from the list.
    
    'Save changes' -- This button saves the chosen settings. After 
    returning to manage_main screen, the buttons which allow adding of
    the chosen meta types will be already visible.