Allow dictionaries in config

changed milestone to %2.3.0

added feature usability labels

assigned to @schaefed

a bit more text please

The config only supports certain data structures but not dictionatries. The idea is, to allow configs like:

varname ; test
#------ ; ----
v1      ; plot(ax_kwargs={xlabel:"x", ylabel:"y"})

which is currently not possible.

added needs discussion label

removed needs discussion label

added accepted label

added category: public API label

added category: config label

changed milestone to %Someday

mentioned in issue #437 (closed)

mentioned in merge request !717 (merged)