Modernize the application

[mikaelsvensson]

The application needs an upgrade. Old dependenices should be upgraded and new Java language features should be used.

[mikaelsvensson]

Migrating from Webpack 3 to 4:

• https://medium.com/@sujankanwar/webpack-upgrade-from-3-to-4-687c6076c285
• https://blog.appoptics.com/migrating-webpack-3-to-4/
• https://webpack.js.org/migrate/4/
• https://www.codeproject.com/Articles/1277835/Step-by-Step-Migration-Webpack-3-to-Webpack-4