- uninstall less-loader

- trial: local clipping planes for DemLayer and TinLayer via material parameter
- start with selcetion boxes for interactive clipping: SelectionBoxFace.js
- main.js: this.renderer.localClippingEnabled = true;

package.json

@@ -22,7 +22,6 @@
         "dotenv": "^8.2.0",
         "file-loader": "^6.2.0",
         "img-loader": "^3.0.2",
-        "less-loader": "^7.1.0",
         "mini-css-extract-plugin": "^1.3.1",
         "node-sass": "^5.0.0",
         "resolve-url-loader": "^3.1.2",