Move the current focus to the previous focusable control.
The action arguments are:
The minimum focus index to move to or -1 to have no minimum value
The maximum focus index to move to or -1 to have no maximum value
In order for this action to complete successfully, there must be a control whose focus index lies between the min and max values. For more information about making controls focusable and the focus operation in Storyboard, refer to the Focus section in the Execution Pipeline part of this document.