GLFullScreen pgraded to unified api

Removed old “MonoMac” namespace qualifier from several types. Changed
RectangleF to CGRect, PointF to CGPoint, float to nfloat, int to nint.
Cast a few nints to ints in function call to CGBitmapContext. Changed
NSView.NSViewGlobalFrameDidChangeNotification to
NSView.GlobalFrameChangedNotification.

Still has multiple runtime warnings.
GlossyClock unified upgrade

Removed old “MonoMac” namespace qualifier from several types. Changed
RectangleF to CGRect in several places. Changed string in Clockview.cs
line 91 to “Menlo-Regular” to fix runtime notice.

Warning: ClockTimer.cs(12,11): warning CS0414: The private field
`GlossyClock.ClockTimer.myTTimer' is assigned but its value is never
used

This warning about unused variable is incorrect.