misc: use <button> for form buttons (#17845)

combo/apps/lingo/templates/lingo/combo/basket.html

@@ -16,7 +16,7 @@
   {% endfor %}
   <li><strong>{% trans "Total:" %}</strong> {{ regie_info.total }} €</li>
 </ul>
-<input type="submit" value="{% trans "Pay" %}"/>
+<button>{% trans "Pay" %}</button>
 </form>
 {% endfor %}
 {% endif %}

combo/apps/newsletters/templates/newsletters/newsletters.html

@@ -33,7 +33,7 @@
       {% endfor %}
     </tbody>
   </table>
-  <input type="submit" value="{% trans "Modify" %}"/>
+  <button>{% trans "Modify" %}</button>
 </form>
 {% endif %}
 {% else %}

combo/apps/wcs/templates/combo/wcs/tracking_code_input.html

@@ -10,7 +10,7 @@
     {% endblocktrans %}
   </p>
   <input id="tracking-code" placeholder="{% trans 'ex: CNPHNTFB' %}"/>
-  <input type="submit" value="{% trans 'Submit' %}"/>
+  <button>{% trans 'Submit' %}</button>
  </form>
  <script type="text/javascript">
 $(function() {

combo/manager/templates/registration/login.html

@@ -5,6 +5,6 @@
 <form method="post">
 {% csrf_token %}
 {{ form.as_p }}
-<input type="submit" value="{% trans 'Log in' %}" />
+<button>{% trans 'Log in' %}</button>
 </form>
 {% endblock %}