Double-tap (on touch screens) does not re-disable the structure visualiser

[giovannipizzi]

(On the new BZ visualiser using JSMol).

Instead, it works for the BZ visualiser.
I think one might need to add a double-tap action.

This is not yet fixed in (seek path's) version 1.9.1. Probably due to my lack of understanding, or (I think) also because JSMol "swallows" some signals, probably.

Decide if instead we want to have a button on top to enable/disable interaction?

Moved from giovannipizzi/seekpath#60