Default to static image, switch to structure

[cryos]

We should show a static image of the structure by default, and offer the option to switch to the view of the atoms. On lower performance machines this can cause performance issues, and the data transfer for bigger systems is likely large. See https://www.ebi.ac.uk/pdbe/entry/pdb/1y8w where they offer a 3D visualization as a larger view overlaid on demand. We should also extract the atom count, species as useful summaries.

[cjh1]

We already display the species, do you mean the atom count for each species?