Printing spectrum

[lpatiny]

I would like that if we try to print the page containing a spectrum we only display what is usually in the clipboard (when we copy)

We can use to achieve this goal the @media print css rule but currently the way the dom is organised makes it very difficult.

Ideally we would need a div id="nmrium-viewer-content' that contains all that should be printed.

This will likely require that the bottom toolbar is moved.