Resolve "More extensible person and group detail page"

Closes #1109 (closed)

aleksis/core/frontend/components/generic/chips/CounterChip.vue

 <template>
   <v-chip v-bind="$attrs" v-on="$listeners">
     <v-avatar :left="!onlyShowCount" v-if="count !== null">
-      {{ count }}
+      {{ $n(count) }}
     </v-avatar>
     <slot v-if="!onlyShowCount" />
   </v-chip>