webpack: remove children from output

[arikfr]

What type of PR is this? (check all applicable)

• Other

Description

Removes from webpack output messages like:

Child mini-css-extract-plugin node_modules/css-loader/index.js??ref--7-1!node_modules/less-loader/dist/cjs.js??ref--7-2!client/app/visualizations/chart/Editor/editor.less:
    Entrypoint mini-css-extract-plugin = *
Child mini-css-extract-plugin node_modules/css-loader/index.js??ref--7-1!node_modules/less-loader/dist/cjs.js??ref--7-2!client/app/visualizations/chart/Renderer/renderer.less:
    Entrypoint mini-css-extract-plugin = *
Child mini-css-extract-plugin node_modules/css-loader/index.js??ref--7-1!node_modules/less-loader/dist/cjs.js??ref--7-2!client/app/visualizations/choropleth/Renderer/renderer.less:
    Entrypoint mini-css-extract-plugin = *