Experimental implementation for webapp plugins (#7185)

* Start of experimental implementation for webapp plugins

* Updates to webapp plugin architecture

* Update pluggable test

* Remove debug code

webapp/store/index.js

@@ -104,7 +104,7 @@ export default function configureStore(initialState) {
             autoRehydrate: {
                 log: false
             },
-            blacklist: ['errors', 'offline', 'requests', 'entities', 'views'],
+            blacklist: ['errors', 'offline', 'requests', 'entities', 'views', 'plugins'],
             debounce: 500,
             transforms: [
                 setTransformer