Fix live updating of comments on doc change

src-ui/src/app/components/document-comments/document-comments.component.html

@@ -6,7 +6,8 @@
                 Please enter a comment.
             </div>
         </div>
-        <div class="form-group mt-2 d-flex justify-content-end">
+        <div class="form-group mt-2 d-flex justify-content-end align-items-center">
+            <div *ngIf="networkActive" class="spinner-border spinner-border-sm fw-normal me-auto" role="status"></div>
             <button type="button" class="btn btn-primary btn-sm" [disabled]="networkActive" (click)="addComment()" i18n>Add comment</button>
         </div>
     </form>