bump to node 20

Added buffer as webpack 5 does not use it anymore.
Version change in package.json

Upgraded to node 18 and Webpack 5.
Package cleanup for webpack 5

Upgrade Node from 14 to 16 and associated packages and WebPack config

Record Movie with Potree

Fix Potree polygon clipping

10x volume calculations, base surface definitions. fix 3D vertical area measurements

Allow display of 2D maps which have only a DSM

Cancel upload improvements, automatic task cleanup, configurable doc links

Catch piexif.dump exceptions

Removed TGI plant health equation

I realised the TGI equation may be erroneous thsu I removed it. I am surprised that no one questioned it before so hopefully it was not used much.

Looks like the plugins directory changed from /plugins at some point to /coreplugins so this is a simple update to a few links in the readme.

Fix paginator overflow