adm_themes/simple/templates/system/message.tpl
<div class="message admidio-max-with">
<p class="lead">{$message}</p>
{if $url != ''}
{if $showYesNoButtons}
<button id="admButtonYes" class="btn btn-primary" type="button" onclick="{$url}">
<i class="bi bi-check-circle-fill"></i>
{$l10n->get("SYS_YES")}
</button>
<button id="admButtonNo" class="btn btn-secondary" type="button" onclick="history.back()">
<i class="bi bi-dash-circle-fill"></i>
{$l10n->get("SYS_NO")}
</button>
{else}
{* when forwarding, always display a next button *}
<button class="btn btn-primary admidio-margin-bottom" onclick="{$url}">{$l10n->get("SYS_NEXT")}
<i class="bi bi-arrow-right-circle-fill"></i>
</button>
{/if}
{else}
{* If not forwarded, then always display a back button *}
<button class="btn btn-primary admidio-margin-bottom" onclick="history.back()">
<i class="bi bi-arrow-left-circle-fill"></i>
{$l10n->get("SYS_BACK")}
</button>
{/if}
</div>