Display the tree for similarity

[lpatiny]

We have published an algorithm for NMR spectra similarity using tree-similarity

https://doi.org/10.1016/j.chemolab.2013.05.009

The algorithm was implemented in javascript here:

https://github.com/mljs/tree-similarity

I would like to see the tree on the spectrum in order to check if this algorithm is correct or not.

In the database panel add before the drop down menu to select the database a little toggle button

This could be the icon

This button is available if there is one (and only one) 1D spectrum that is activate.

If this button is active we should display the tree obtained using (from tree-similarity)

const aTree = createTree(a, options);

The display of the tree is something like

but there is no text annotations. Different color per level could be a plus.