VAL-164 - Fix setMenu mutation to preserve reactivity (#48)

* VAL-164 - Fix setMenu mutation

* Add comment explaining changes.

Co-authored-by: Wolfgang Ziegler <[email protected]>

Author: davision

lib/plugin.js

@@ -58,10 +58,7 @@ const storeModule = {
       settings: {}
     },
     messages: [],
-    menus: {
-      main: [],
-      footer: []
-    }
+    menus: {}
   }),
   getters: {},
   mutations: {
@@ -106,7 +103,9 @@ const storeModule = {
       state.messages.push(message)
     },
     setMenu (state, { name, data }) {
-      state.menus[name] = data
+      // Update the menu in a way it works well with Vue's reactivity.
+      // See https://vuex.vuejs.org/guide/mutations.html#mutations-follow-vue-s-reactivity-rules
+      state.menus = { ...state.menus, [name]: data }
     }
   },
   actions: {