Build or reuse a timeline for a given element or set of elements (graph lab values over a range of time, etc)

[mcbride-p]

Build or reuse a timeline for a given element or set of elements (graph lab values over a range of time, etc)  There have been other implementations of this (and they can get complex) so would want to reuse as much as possible - or maybe extract the data and launch into a separate viewer vs putting it all in this UI