MNT: Added state dict for plotting widgets
MNT: Added state dict for plotting widgets

Also cleaned up docs

danielballan/datamuxer,NSLS-II/datamuxer,danielballan/dataportal,tacaswell/dataportal,NSLS-II/dataportal,danielballan/datamuxer,ericdill/databroker,danielballan/dataportal,ericdill/datamuxer,NSLS-II/dataportal,ericdill/datamuxer,tacaswell/dataportal,ericdill/databroker