message: Update global notification count when hitting activity feed page.
  Fixes:
diff: import Vue from 'vue';
  import VueRouter from 'vue-router';
  +import { Mutation } from 'vuex-class';
  import { Component, Prop } from 'vue-property-decorator';
  import * as View from '!view!./activity.html';
  @@ -14,6 +15,7 @@ import { AppPageHeader } from '../../components/page-header/page-header';
  import { AppJolticon } from '../../../lib/gj-lib-client/vue/components/jolticon/jolticon';
  import { AppActivityFeed } from '../../components/activity/feed/feed';
  import { AppActivityFeedPlaceholder } from '../../components/activity/feed/placeholder/placeholder';
  +import { Store } from '../../store/index';
  @View
  @Component({
  @@ -27,6 +29,8 @@ import { AppActivityFeedPlaceholder } from '../../components/activity/feed/place
  export default class RouteActivity extends Vue {
  @Prop(String) tab: 'activity' | 'notifications';
  + @Mutation setNotificationCount: Store['setNotificationCount'];
  +
  feed: ActivityFeedContainer | null = null;
  activityUnreadCount = 0;
  notificationsUnreadCount = 0;
  @@ -67,8 +71,10 @@ export default class RouteActivity extends Vue {
  this.activityUnreadCount = this.$payload.activityUnreadCount || 0;
  this.notificationsUnreadCount = this.$payload.notificationsUnreadCount || 0;
  - // TODO: Make this a vuex thing?
  - // Update the notification count directive to show the new unread count.
  - // $rootScope.$broadcast( 'NotificationCount.refresh' );
  + // Since we clear out the notifications on the page let's set the count
  + // as being the opposite of the tab we're on.
  + this.setNotificationCount(
  + this.tab === 'activity' ? this.notificationsUnreadCount : this.activityUnreadCount
  + );
  }
  }
  