The state digram is constrainted into a frame of the page rendering
and the prior configuration set it to be a maximum of 660 pixels,
however we should allow the image to be aligned to page size which
can result in a larger image, but still constrained slightly so
spinx includes a link to the image.
Change-Id: I19350fc010bd5aac798b2d57ea3d2eb98239a457
0d2a2e4bf4