Don't know
Change Square to UCSquare class

+Deleted the old Square class, swapping it for better organized
UserControl class Square
+Made mouseOver, leftClick, rightClick controls for UCSquare that enable
unboxing, flagging, question marking of the square
+ mouseOver of any square adjusts the size (h + w) by -1, to show a
single pixel of white.
+ Added control bools for hasMine, isFlagged, isQuestion, isOpen

- Strange "Partial GameForm" error.
- Don't know how to make SmileFaceIcon (GameForm.btnStart) turn to
ScareFaceIcon on mouseDown while anywhere in the GameForm.panel