[plotter] Lacks consistence on sharing behaviour
Currently the creation of a plotter is not much consistent.
From our discussion we assume this:
----> dataformat----> plotter 1,...,n and for each plotter ----> plotter parameter 1,...,k
It misses a check that each dataformat has a plotter (i.e. and a default plotter) that is public. This should be done at the creation of a plotter. The issue is that a person could add experiments to report (the experiment having an accessible dataformat), but he is not able to use the plotters if they are private.
The plotter parameters are not related to any plotters (should this be done ?)