Add selection to the fullscreen graph

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