Fixes #1717 (Node Size bypass cannot be cleared through the UI)

Change-Id: I60624d75c7918e49708adddb1d8c10a5128d432b
Fixes #1747 : Cy2 visual property "EdgeColor" is now converted to two properties (EDGE_UNSELECTED_PAINT and EDGE_STROKE_UNSELECTED_PAINT).

Change-Id: Iacf3799b13f212c5be30032c1c9fb3cc0da82eb9
Integrated tests updated after fixing bug #1747

Change-Id: I2f8db097193c6ae060a197cb0e9ba31cdf030a79