Multiple time series & tooltip as div

* Possible to draw more than one time series in run charts
* Rec ctrl runchart now shows time series for `Open date - Queue date` & `Open date - Rec ctrl start`. Time series drawn in differing colours
* Rec ctrl boxplot on Open date - Rec ctrl start time series (drawn in different colour)
* Tooltips changed to work through a dedicated div rather than drawing
in the svgs
* Tooltip div size changes according to amount of information to display