TrvCustomAction is a base class for all RichViewActions.
TrvCustomAction = class(TAction)
Syntax (if TNT Controls are used)
TrvCustomAction = class(TAction, ITntAction)
This action is not used directly, but all RichViewActions are inherited from it.
•ControlPanel links this action to a control panel defining additional properties for the action.
•Disabled allows to disable this action.