{% comment %}
Standard sub-page header: a back arrow on the left and a centered title.
Usage:
  {% include 'main/_subheader.html' with title="Deposit" back="/wallet/" %}
  {% include 'main/_subheader.html' with title="Details" %}   (back defaults to history.back())
{% endcomment %}
<div class="subheader">
    <div style="width: 40px; display: flex; justify-content: flex-start; flex: none;">
        {% if back %}
        <a href="{{ back }}" class="back-btn" aria-label="Go back">←</a>
        {% else %}
        <a href="/personal/" onclick="history.back(); return false;" class="back-btn" aria-label="Go back">←</a>
        {% endif %}
    </div>
    <h2 class="page-title" style="flex: 1; text-align: center; margin-right: 40px;">{{ title }}</h2>
</div>