amcharts bundles megabytes of unused dependencies

[kleinfreund]

What happened?

The @amcharts/amcharts4 package we’re using for charts is distributed in a very problematic manner which adds several megabytes of data to the production bundle of Kuma GUI.

This is discussed at length in amcharts/amcharts4#82.

Just the following two entries total 2.5 MB in uncompressed size. Of the 1.76 MB, well over half of the size is taken up by amcharts.

  File                                    Size                                                  Gzipped
dist/js/pdfmake.js                      2113.96 KiB                                           925.98 KiB
dist/js/xlsx.js                         480.08 KiB                                            156.79 KiB

We should consider an alternative that is bundled and distributed correctly.

[kleinfreund]

In #361, I’ll mark those dependencies as external so they’re no longer bundled with the application.