Display: Fix show page when message has no tags - refs BT#21705

assets/css/scss/_messages.scss

@@ -9,6 +9,10 @@
     @apply flex justify-end gap-2 items-center;
   }
 
+  &__tags {
+    @apply flex gap-2;
+  }
+
   &__tag-searcher.field {
     @apply mb-0;
   }

assets/vue/views/message/MessageShow.vue

@@ -33,6 +33,10 @@
     </SectionHeader>
 
     <div class="message-show__tags-container">
+      <div
+        v-if="myReceiver"
+        class="message-show__tags"
+      >
         <BaseChip
           v-for="tag in myReceiver.tags"
           :key="tag['@id']"
@@ -41,6 +45,7 @@
           label-field="tag"
           @remove="onRemoveTagFromMessage(tag)"
         />
+      </div>
 
       <BaseAutocomplete
         v-if="item.sender && item.sender['@id'] !== securityStore.user['@id']"