Changes

NEWT/OSX: Fix erroneous child Window position and top-parent visibility

- Regardless whether the window is a top-level or child window,
  we set it's position w/ absolut left-bottom coordinated.
  To do so even for an AWT parent component, we retrieve the screen position
  by traversing through the AWT tree and adding up each parent's rel. position,
  since the native view only reflects the AWT frame.
  Note: OSX does not use native views for each AWT component.

- In case we reparent child -> top, we cannot orderOut() the ex parent,
  but need to just call orderBack(..), otherwise the whole ex-parent frame
  gets hidden.

- In case we close a child window (and reparent child -> top),
  we need to remove the parent/child relation and orderOut(..)
  before close(..), otherwise the window artifact is left behind.

NEWT Parenting Tests: Run all AWT modification call's on AWT EDT as the spec demands; Add missing frame.validate() after change.

This is esential for OSX, but may also cause an undefined state on other platforms.

Fix Nativewindow GetLocationOnScreen OSX impl. - Transform OSX origin bottom-left to our top-left origin.

FBO MRT Test: Disable OSX, since it causes an SIGSEGV (Bus Error/Illegal Memory Access) @ glDrawArrays()

NEWTCanvasAWT: Add AWT GraphicsConfiguration in constructor, allowing transparency

Test Util NEWGLContext: Add assertions

Test: Add AWT/GLCanvas transparency test

NEWT OSX: Disable native VERBOSITY

OSX Minor Cleanups: ctx delete note (freeze when shared ctx), Better MainThread Thread name[s]

Newt/OSX: Fix top/child positioning, positionChanged(), rely on native pos/size notifications

Newt/MacWindow
  - remove redundant manual window-move/set-size code
  - Use local getLocationOnScreen(..), fixes positionChanged(..)
  - setFrameTopLeftPoint(..) use totalHeight (w/ insets)
  - create: don't 'retain' the window reference (ref counter)
  - close: release view,
  - cache insets - to be used @ create

Test Shared - Window Positioning: don't assume req pos. is realized, use rel positions to 1st window

NEWT/OSX MacWindow: Use screen of window

NativeWindow/OSX: Use screen of window