fix: Error with this.unsubscribe is not a function (#499)

src/components/ADempiere/Dashboard/docstatus/index.vue

@@ -40,6 +40,7 @@ export default {
   data() {
     return {
       documents: [],
+      unsubscribe: () => {},
       search: ''
     }
   },
@@ -89,7 +90,7 @@ export default {
       })
     },
     subscribeChanges() {
-      this.$store.subscribe((mutation, state) => {
+      return this.$store.subscribe((mutation, state) => {
         if (mutation.type === 'notifyDashboardRefresh') {
           this.getPendingDocuments()
         }

src/components/ADempiere/Dashboard/recentItems/index.vue

@@ -49,6 +49,7 @@ export default {
   data() {
     return {
       recentItems: [],
+      unsubscribe: () => {},
       isLoaded: true,
       search: '',
       accentRegexp: /[\u0300-\u036f]/g
@@ -144,7 +145,7 @@ export default {
       }
     },
     subscribeChanges() {
-      this.$store.subscribe((mutation, state) => {
+      return this.$store.subscribe((mutation, state) => {
         if (mutation.type === 'notifyDashboardRefresh') {
           this.getRecentItems()
         }

src/components/ADempiere/Dashboard/userfavorites/index.vue

@@ -54,6 +54,7 @@ export default {
   data() {
     return {
       favorites: [],
+      unsubscribe: () => {},
       isLoaded: true,
       search: '',
       accentRegexp: /[\u0300-\u036f]/g
@@ -108,7 +109,7 @@ export default {
       })
     },
     subscribeChanges() {
-      this.$store.subscribe((mutation, state) => {
+      return this.$store.subscribe((mutation, state) => {
         if (mutation.type === 'notifyDashboardRefresh') {
           this.getFavoritesList()
         }

src/components/ADempiere/Form/PriceChecking/index.vue

@@ -37,7 +37,8 @@ export default {
   mixins: [formMixin],
   data() {
     return {
-      fieldsList
+      fieldsList,
+      unsubscribe: () => {}
     }
   },
   created() {

src/views/ADempiere/Test/index.vue

@@ -96,7 +96,8 @@ export default {
   },
   data() {
     return {
-      fieldsList
+      fieldsList,
+      unsubscribe: () => {}
     }
   },
   computed: {