quick patch to enable Term fold all
changes to plotting. I didn't like the chaining, it was pointless.
I think I prefer accumulative state. This allows individual plotted series to have different options.
e.g. enable shapes on trade, but lines on bid/ask.
Merge branch 'master' of https://github.com/dan-van/scespet
Updates required by the new approach to EnvTermBuilder becoming DelayedInit