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).

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