Stores the shortcut references.
property Keys [Index: integer]: TShortCut;
Use Keys to obtain a pointer to a specific shortcut in the array. The Index parameter indicates the index of the shortcut, where 0 is the index of the first shortcut, 1 is the second, and so on.
Use Keys with the Count property to iterate through all of the shortcuts in the queue.
New shortcuts are added using Add method to the beginning of the queue. If a new shortcut is being added last shortcut in a queue is deleted.