feat: use button groups in admin tables

templates/admin.html

@@ -50,8 +50,10 @@
 	      <td>{{ '✓' if user.is_admin else '✗' }}</td>
 	      <td>{{ '✓' if user.logout_after_purchase else '✗' }}</td>
 	      <td>
+		<div class="btn-group" role="group">
                   <a class="btn btn-primary" href="/moduser?userid={{ user.id }}">Edit</a>
                   <a class="btn btn-danger" href="/moduser?userid={{ user.id }}&change=del">Delete</a>
+		</div>
 	      </td>
 	    </tr>
 	  {% endfor %}
@@ -104,8 +106,10 @@
 	      <td>{{ '✓' if product.stockable else '✗' }}</td>
 	      <td><img style="height: 2em;" src="/static/upload/thumbnails/products/{{ product.id }}.png?cacheBuster={{ now }}" alt="Picture of {{ product.name }}" draggable="false"></td>
 	      <td>
+		<div class="btn-group" role="group">
                   <a class="btn btn-primary" href="/modproduct?productid={{ product.id }}">Edit</a>
                   <a class="btn btn-danger" href="/modproduct?productid={{ product.id }}&change=del">Delete</a>
+		</div>
 	      </td>
 	    </tr>
 	  {% endfor %}