Revert "Upgrade Monaco Editor (#847)" (#850)

This reverts commit 5e2b8d7df0.

package.json

@@ -74,7 +74,7 @@
     "jquery-ui-dist": "1.12.1",
     "knockout": "3.5.1",
     "mkdirp": "1.0.4",
-    "monaco-editor": "0.24.0",
+    "monaco-editor": "0.18.1",
     "ms": "2.1.3",
     "p-retry": "4.2.0",
     "plotly.js-cartesian-dist-min": "1.52.3",
@@ -159,7 +159,7 @@
     "less-loader": "4.1.0",
     "less-vars-loader": "1.1.0",
     "mini-css-extract-plugin": "0.4.3",
-    "monaco-editor-webpack-plugin": "3.1.0",
+    "monaco-editor-webpack-plugin": "1.7.0",
     "node-fetch": "2.6.1",
     "playwright": "1.10.0",
     "prettier": "2.2.1",