Add selection to the fullscreen graph

[MarkRobbo]

Browser limitations mean that the same graph cannot be inserted into the DOM (necessary for highlighting) due to duplicate IDs, so the full screen graph currently uses a standard object tag.

This is not ideal as it is then less capable than the standard page graph

Possible solutions include restyling with CSS to create a fullscreen view (may cause problems with parent containers needing to change too) or aggressively moving the svg within the page using javascript