Activation policies that control how the app is activated.
This type can have following values:
"regular"- The application is an ordinary app that appears in the Dock and may have a user interface.
"accessory"- The application does not appear in the Dock and does not have a menu bar, but it may be activated programmatically or by clicking on one of its windows.
"prohibited"- The application does not appear in the Dock and may not create windows or be activated.