Add vertical lines for testing.

Change-Id: I93d3613547b74a37cebbb6e791e0d23ea405401b
Same solid line treatment for vertical lines during on-screen drawing.

Change-Id: Idb352dc2afeb2ee7b48620c972c2a186209228ea
Better on-screen drawing of vertical dashed lines.

Change-Id: I53d5f8b0278d1228cd941221a07cd360943c5ce6