reduce bundle-size

[hardl]

investigate if and how the bundle size of luigi.js and .css can be reduced.

Not in scope: IE11 bundles.

starting point:

PASS  ./public/luigi.js: 568.73KB < maxSize 600KB (no compression) 

 PASS  ./public/luigi.css: 573.21KB < maxSize 600KB (no compression) 

 PASS  ./public-ie11/luigi-ie11.js: 781.5KB < maxSize 799KB (no compression) 

 PASS  ./public-ie11/luigi-ie11.css: 573.69KB < maxSize 600KB (no compression) 

[JohannesDoberer]

message obj for init and specialIframes in App.html and context update in iframe.js could be in one function.. it's the same code

-> Update: We don't win anything....discussed with Philipp

[JohannesDoberer]

we have two functions replaceVars in genericHelpers and iframeHelpers.. maybe they do the same https://github.com/SAP/luigi/pull/2295