Changes

NEWT EDT: Fix dbl-chk-locking, runOnEDT fast-path, enqueEvent dispatch immed. if on EDT

NEWT WindowImpl EDT fixes

- all features intended to run on EDT and lock the surface shall only allowed to wait for result,
  if the surface is unlocked. Otherwise don't wait - ie a pending operation.

- proper sequence of all feature Runnables, ie include pre/post lock actions in Runnable,
  since it might be a pending task (see above).

This shall avoid deadlocks cause by user code where features are called (visible, fullscreen, ..)
when invoked within a locked surface code path - ie GLAutoDrawable.invoke(boolean wait, GLRunnable glRunnable).

unit tests: Gears, TestGearsNEWT, WindowImplAccess

Gears (add cursor rotation)

TestGearsNEWT (add decoraction toggle 'd')

WindowImplAccess NEWT Closing tests .. programmatical close on EDT,
which simulates 1:1 native closing operation.