impliment hack fix due to

angular/angular-cli#11439

ui/package.json

@@ -7,7 +7,8 @@
     "build": "ng build",
     "test": "ng test",
     "lint": "ng lint",
-    "e2e": "ng e2e"
+    "e2e": "ng e2e",
+    "prepare": "patch-package"
   },
   "private": true,
   "dependencies": {
@@ -32,7 +33,9 @@
     "marked": "^0.6.0",
     "ng2-truncate": "^1.3.17",
     "ngx-toastr": "^9.1.1",
+    "patch-package": "^6.0.5",
     "popper.js": "^1.14.7",
+    "postinstall-prepare": "^1.0.1",
     "protobufjs": "^6.8.8",
     "quill": "^1.3.6",
     "quill-blot-formatter": "^1.0.5",

ui/patches/@angular-devkit+build-angular+0.8.9.patch

@@ -0,0 +1,13 @@
+diff --git a/node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/common.js b/node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/common.js
+index 99903a9..2df2337 100644
+--- a/node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/common.js
++++ b/node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/common.js
+@@ -187,7 +187,7 @@ function getCommonConfig(wco) {
+                 ngDevMode: false,
+             },
+         } : {
+-            pure_getters: buildOptions.buildOptimizer,
++            pure_getters: false,
+             // PURE comments work best with 3 passes.
+             // See https://github.com/webpack/webpack/issues/2899#issuecomment-317425926.
+             passes: buildOptions.buildOptimizer ? 3 : 1,