intoCornersProperty

When false, the top and bottom nodes do NOT extend into the corners. i.e. the left edge of the top and bottom nodes are in line with the right edge of the left node, and the right edge of the top and bottom nodes are in line with the left edge of the right node.

Otherwise, top and bottom occupy the full width of the BorderPane.

This was introduced specifically for Rulers, but may have other uses. See DemoRuler in the glok-demos subproject.