created mergedConfig getter to avoid obnoxious checks for undefined everywhere

src/components/favorite_button/favorite_button.js

@@ -1,10 +1,9 @@
+import { mapGetters } from 'vuex'
+
 const FavoriteButton = {
   props: ['status', 'loggedIn'],
   data () {
     return {
-      hidePostStatsLocal: typeof this.$store.state.config.hidePostStats === 'undefined'
-        ? this.$store.state.instance.hidePostStats
-        : this.$store.state.config.hidePostStats,
       animated: false
     }
   },
@@ -28,7 +27,8 @@ const FavoriteButton = {
         'icon-star': this.status.favorited,
         'animate-spin': this.animated
       }
-    }
+    },
+    ...mapGetters(['mergedConfig'])
   }
 }
 

src/components/favorite_button/favorite_button.vue

@@ -6,7 +6,7 @@
       :title="$t('tool_tip.favorite')"
       @click.prevent="favorite()"
     />
-    <span v-if="!hidePostStatsLocal && status.fave_num > 0">{{ status.fave_num }}</span>
+    <span v-if="!mergedConfig.hidePostStats && status.fave_num > 0">{{ status.fave_num }}</span>
   </div>
   <div v-else>
     <i
@@ -14,7 +14,7 @@
       class="button-icon favorite-button"
       :title="$t('tool_tip.favorite')"
     />
-    <span v-if="!hidePostStatsLocal && status.fave_num > 0">{{ status.fave_num }}</span>
+    <span v-if="!mergedConfig.hidePostStats && status.fave_num > 0">{{ status.fave_num }}</span>
   </div>
 </template>