Fix add index on new table form has duplicate go buttons in the modal

Go to create a new table then add an index on a column you want to create, see the duplicate buttons in the footer

Signed-off-by: William Desportes <williamdes@wdes.fr>

templates/table/index_form.twig

@@ -239,10 +239,13 @@
         </div>
         </div>
     </fieldset>
+    {# The modal already has buttons to execute and preview SQL #}
+    {%- if not create_edit_table -%}
     <fieldset class="pma-fieldset tblFooters">
         <button class="btn btn-primary" type="submit">{% trans 'Go' %}</button>
         <button class="btn btn-secondary" type="submit" id="preview_index_frm">{% trans 'Preview SQL' %}</button>
     </fieldset>
+    {%- endif -%}
 </form>
 {% if is_from_nav %}
   {{ include('modals/preview_sql_modal.twig') }}