Changes

Fix WGL bitmap regression while fixing it (96a0e0706258824c1dd524d4cbd7682a904b84f4)

Always issue GLEventListener's initialization, if provoked by ctx creation

NEWT: Add WindowListener.windowDestroyed() ; Remove WindowImpl.windowDestroyed()

Add WindowListener.windowDestroyed()
  To expose a proper window lifecycle, ie destroy-notify and destroyed,
  this notification is added.
  This will be used at least in unit tests, where we verify destruction.

Remove WindowImpl.windowDestroyed():
  This native hook (planned to be called by native destroy notification)
  is unreliable or not supported for all platforms.
  NEWT relies on the pre destroy native hooks and handles the final
  destroy notification itself.

Cleanup / Debug

GLCanvas: lock/sync drawable usage ; remove destroyed refs (context, drawable, awtConfig) ; Try create/destroy AbstractGraphicsDevice on EDT

TestCloseNewtAWT: Use new AWTRobotUtil.closeWindow()

Fix WindowClosingProtocol test, using new AWTRobotUtils

AMD/X11: Added AMD/X11 workaround

On AMD/X11 the create/destroy sequence must be the same
even though this is agains the chicken/egg logic here ..

NB: Fix test folder (missed at src/junit -> src/test renaming)

scripts: add new tests