create single scss pack and script

remove unnecessary file from pack
fix problem dev change style
fix theme picker

lib/config/webpack.common.js

@@ -130,6 +130,8 @@ module.exports = {
                     query: {
                         happyPackMode: true,
                         "compilerOptions": {
+                            "outDir": "./",
+                            "declaration": true,
                             "paths": {
                             }
                         }