Fix AWT Printing: Use delegated GLDrawable's size for tile-size instead of AWT-GLAD's size, since the latter uses AWT's component size.

.. the AWT component size could have been modified after setupPrinting(..).

The AWT-GLAD getWidth() and getHeight() is implemented by AWT's component
and hence may not reflect the actual GLDrawable size while printing.
TileRendererBase.GLEL.display(): Skip tile-rendering if TR is not yet setup. Sync issue w/ NEWT/AWT based GLAD

NEWT based GLDrawables may trigger GLAD display() via native repaint events.

If using in conjunction w/ AWT, i.e. NewtCanvasAWT and setupPrinting(..) has been called
and it's attched to the TR .. it could happen that display tries to issue beginTile()
before the TR is being setup.

This patch mitigates this issue (while not removing it) by querying whether setup is completed.