Action (gb.qt4)
This class allows you to manage the actions defined in the 
Action property of many controls.
Static properties
| Keys | Return the list of all registered actions | 
Static methods
| IsLocked | Return if the action activation has been disabled by the Lock method. | 
| Lock | Disables the action activation. | 
| Raise | Activates the action the specified Control is linked to. | 
| Unlock | Enables the action activation. | 
Properties
| Controls | Return all controls associated with the action. | 
| Enabled | Enables or disables all controls associated with an action. | 
| HasShortcut | Return if the action can have a shortcut. | 
| Picture | Returns or sets the picture of all controls associated with an action. | 
| Shortcut | Returns or defines the keyboard shortcut associated with the action. | 
| Text | Returns or sets the text of all controls associated with an action. | 
| Tooltip | Returns or sets the tooltip of all controls associated with an action. | 
| Value | Returns or sets the toggle value of all controls associated with an action. | 
| Visible | Shows or hides all controls associated with an action. |