Our graphs throw a javascript exception if you mouse outside of the graph shown. This fix just sets the available hover region to be exactly that of the graph. [Finishes #64655760]
Our graphs throw a javascript exception if you mouse outside of the graph shown.
This fix just sets the available hover region to be exactly that of the graph.
[Finishes #64655760]

keithiopia/spotlight,tijmenb/spotlight,alphagov/spotlight,tijmenb/spotlight,alphagov/spotlight,keithiopia/spotlight,keithiopia/spotlight,tijmenb/spotlight,alphagov/spotlight