Cumulative line chart old tooltips working again.
Needed to modify pointer-events depending on whether
useInteractiveGuideline was set to true or false.
Average lines on cumulative line chart had ability to go
off the <SVG> bounding rectangle. This caused issues on Firefox.
Changed code so that the average lines are 'clamped' within
the <SVG> bounding rect, and if they go off bounds, make them transparent.