Make node clickable

[anvaka]

According to request here when clicking on a node we want to start a new search from this node.

I'm not sure how this trigger should work yet - whether a single click should do it, or maybe double? Or maybe single click should just show a context menu with possible actions (start search, open it on google, etc.).

[laggedHero]

What about:

• Clicking a node starts a new search

• Clicking a line opens the "vs" in google

A context menu could open space for more options, tho.

[gg4u]

I would do one click to search, long click to display contextual menu.