Remove hardcoded dependency on 'Catalog'

gistfile1.erb

      <!-- Full navigation
      ============================================= -->
      <nav class="full {{ settings.mobile-navigation-colour-scheme }}">

        <!-- Main nav
        ++++++++++++++++++++++++++++ -->
        <ul>

          {% for link in linklists.main-menu.links %}<li class="nav-item {% include 'for-looper' %} {% if link.title == settings.catalog-label-override and settings.enable-mega-nav %}has-mega-nav{% endif %} {% capture link_handle %}{{ link.title | handle }}{% endcapture %}  {% if linklists[link_handle] and linklists[link_handle].links.size > 0 %}dropdown{% endif %}">

            {% assign meganav = false %}
            {% if link.title == settings.catalog-label-override and settings.enable-mega-nav %} {% assign meganav = true %} {% endif %}

            {% assign dropdown = false %}
            {% if meganav == false and linklists[link_handle] and linklists[link_handle].links.size > 0 %} {% assign dropdown = true %} {% endif %}

              {% if dropdown or meganav %}<span class="border"></span>{% endif %}
              <a class="label" href="{{ link.url }}">{{ link.title }}{% if dropdown or meganav %}<span class="icon"><</span>{% endif %}</a>

              {% if dropdown %}

                <!-- Simple dropdown: primary
                ++++++++++++++++++++++++++++ -->
                <ul class="dropdown-wrap primary">
                  {% for link_primary in linklists[link_handle].links %}

                    {% capture link_handle_primary %}{{ link_primary.title | handle }}{% endcapture %}
                    {% assign dropdown = false %}
                    {% if linklists[link_handle_primary] and linklists[link_handle_primary].links.size > 0 %} {% assign dropdown = true %} {% endif %}

                    <li class="dropdown-item {% include 'for-looper' %}">
                      <a href="{{ link_primary.url }}"><span class="label">{{ link_primary.title }}</span>{% if dropdown %}<span class="icon">></span>{% endif %}</a>

                      {% if dropdown %}

                        <!-- Simple dropdown: secondary
                        ++++++++++++++++++++++++++++ -->
                        <ul class="dropdown-wrap child secondary right">
                          {% for link_secondary in linklists[link_handle_primary].links %}

                            {% capture link_handle_secondary %}{{ link_secondary.title | handle }}{% endcapture %}
                            {% assign dropdown = false %}
                            {% if linklists[link_handle_secondary] and linklists[link_handle_secondary].links.size > 0 %} {% assign dropdown = true %} {% endif %}

                            <li class="dropdown-item {% include 'for-looper' %}">
                              <a href="{{ link_secondary.url }}"><span class="label">{{ link_secondary.title }}</span>{% if dropdown %}<span class="icon">></span>{% endif %}</a>

                              {% if dropdown %}

                                <!-- Simple dropdown: tertiary
                                ++++++++++++++++++++++++++++ -->
                                <ul class="dropdown-wrap child tertiary right">
                                  {% for link_tertiary in linklists[link_handle_secondary].links %}
                                    <li class="dropdown-item {% include 'for-looper' %}"><a href="{{ link_tertiary.url }}"><span class="label">{{ link_tertiary.title }}</span></a></li>
                                  {% endfor %}
                                </ul>
                                <!-- ++++++++++++++++++++++++++++ -->

                              {% endif %}
                            </li>

                          {% endfor %}
                        </ul>
                        <!-- ++++++++++++++++++++++++++++ -->

                      {% endif %}
                    </li>

                  {% endfor %}
                </ul>
                <!-- ++++++++++++++++++++++++++++ -->

              {% endif %}
          </li>{% endfor %}
        </ul>
        <!-- ++++++++++++++++++++++++++++ -->

      </nav>