Bug 919 - TestNewtKeyCodesAWT w/ NewtCanvasAWT Fails on Windows Due to Clogged Key-Release Event by AWT Robot

Impact: Only unit test code

- TestNewtKeyCodesAWT:
  Fix Bug 919 - Move mouse bacl/forth while waiting for events ..

- Use common wait for key timeout/polling using constants in NEWTKeyUtil

- InputEventCountAdapter:
  'getQueued()' -> 'copyQueue()' - ensuring queue is copied while instance is locked.