DrawButtonFace(): Improved the look of Flat=True buttons
DrawButtonFace(): Improved the look of Flat=True buttons

Flat=True (toolbar) style buttons now have a thinner border when
the mouse hovers over them. They also have an improved look in
Down=True state.

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