promoted nested function CalculatePositions() to a method of TfpgBaseButton
promoted nested function CalculatePositions() to a method of TfpgBaseButton

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI