Finally found out about the ;base64, magic marker expected by jmol
Use the "Load 3D Live" checkbox
Use the Jmol script URL, not the request URL

The jsmol callback url is shared state between all applets on a page,
so we cannot use it in worksheet_jsmol_data() to figure out the
cell. Instead, pass the cell information through the script name
parameter.
The checkboxes are already initialized in the base.html template
Fix the live 3D checkbox
Fix covering up older applets as the limit is exceeded