Revert "Merge pull request !2870 from rhodecode-enterprise-ce Polymer-lit-migration-1"

This reverts commit 262fefa9a9, reversing
changes made to 57d841d6ea.

grunt_config.json

@@ -102,23 +102,10 @@
       "nonull": true
     }
   },
-  "terser": {
+  "uglify": {
     "dist": {
-      "options": {
-        "compress": {
-          "ecma": 6
-        },
-        "mangle": {
-          "keep_classnames": true,
-          "keep_fnames": false
-        },
-        "output": {
-          "ecma": 6
-        }
-      },
-      "files": {
-        "<%= dirs.js.dest %>/scripts.min.js": "<%= dirs.js.dest %>/scripts.js"
-      }
+      "src": "<%= dirs.js.dest %>/scripts.js",
+      "dest": "<%= dirs.js.dest %>/scripts.min.js"
     }
   },
   "less": {
@@ -169,6 +156,7 @@
       "tasks": [
         "less:development",
         "less:components",
+        "concat:polymercss",
         "webpack",
         "concat:dist"
       ]
@@ -181,6 +169,7 @@
       ],
       "tasks": [
         "less:components",
+        "concat:polymercss",
         "webpack",
         "concat:dist"
       ]