Right-click to open a synth-node in new window.
Right-click to open a synth-node in new window.

This helps to compare parts of the synthetic tree in adjacent windows or
tabs. Display behavior depends on browser settings and (possibly) popup
blockers. Fixes #213.

OpenTreeOfLife/opentree,OpenTreeOfLife/opentree,OpenTreeOfLife/opentree,OpenTreeOfLife/opentree,OpenTreeOfLife/opentree,OpenTreeOfLife/opentree