Refactor Series to use redux pattern

[andrewgryan]

To make it easier to remove namedtuple State #222 updating Series to use a Flux-like state/reactive component design

[andrewgryan]

The functionality has been implemented so this PR is open to review. I am adding docs and release notes

• N.B. The move refactor could have been done in a separate PR but due to time constraints I have done both in this PR. The added tests and paradigm shift should satisfy reliability concerns
• Future: Adding a on/off switch to hide/show/disable the series functionality is now easier to do in the next PR

{
   ...
   "position": { "x": 111000, "y": 111000  },  # Current PR
   "layout": {  # Future PR
       "series_figure": True
   }
}