Changes

Bug 729: OSX CALayer shall honor the Component's visibility state

A once visible CALayer (GLCanvas) must be able to become invisible w/o destruction,
e.g. as required by CardLayout's switching cards.

See unit test for Bug 532: 'TestAWTCardLayoutAnimatorStartStopBug532'

Out native 'fixCALayerLayout(..)' takes the visible state as tracked by JAWTWindow's ComponentListener
and sets our CALayer (root and sub) hidden state accordingly.

Now MacOSXJAWTWindow's layoutSurfaceLayerImpl(..) always calls down to 'fixCALayerLayout(..)'
due to update the visibility state.

test scripts (test Bug 729 w/ TestAWTCardLayoutAnimatorStartStopBug532)

Bug816 OSX CALayer: getLocationOnScreenNonBlocking(..) stop traversing at top-level heavyweight Window, fixes [J]Dialog use case.

Top-level heavyweight Window's position is it's position on screen, hence stop traversing.

Thx to Emmanuel Puybaret for pointing this out.

Adding Dialog and JDialog unit tests as inspired by Emmanuel Puybaret.

Bug 729: OSX CALayer invisible needs to have opacity 0 to not show hidden component.

Completes commit 3b02a219b1b9e446e87df1beb7da4266f74824fa

See unit test: TestBug816OSXCALayerPos03AWT