Add an empty block area on the search results listing.

[FlipperPA]

I had a requirement to add additional fields for a website to the admin search result listing. I accomplished this by overriding the entire template, but it would be much cleaner with a block in the template. Here's what I did:

{% load i18n wagtailadmin_tags %}

{# The title field for a page in the page listing, when in 'explore' mode #}

<div class="title-wrapper">
    {% if page.sites_rooted_here.exists %}
        {% if perms.wagtailcore.add_site or perms.wagtailcore.change_site or perms.wagtailcore.delete_site %}
            <a href="{% url 'wagtailsites:index' %}" class="icon icon-site" title="{% trans 'Sites menu' %}"></a>
        {% endif %}
    {% endif %}

    {% if page_perms.can_edit %}
        <a href="{% url 'wagtailadmin_pages:edit' page.id %}" title="{% trans 'Edit this page' %}">{{ page.get_admin_display_title }}</a>
    {% else %}
        {{ page.get_admin_display_title }}
    {% endif %}

    {# MEETING GUIDE: DISPLAY DAY OF WEEK AND ADDRESS, IF ON CURRENT PAGE #}
    {% if page.day_of_week >= 0 and page.day_of_week <= 6 %}
        ({{ page.get_day_of_week_display }})
    {% endif %}
    {% if page.formatted_address %}
        <br>{{ page.formatted_address }}
    {% endif %}
    {# END MEETING GUIDE MODIFICATIONS #}

    {% include "wagtailadmin/pages/listing/_privacy_indicator.html" with page=page %}
    {% include "wagtailadmin/pages/listing/_locked_indicator.html" with page=page %}
</div>

<ul class="actions">
    {% page_listing_buttons page page_perms %}
</ul>

This PR adds an empty block area on the search results listing, for adding extra fields after the title (such as I have in this code between the {# MEETING GUIDE #} comments). Would this require a change in the documentation? I couldn't find anywhere appropriate.

Happy Holidays!

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Test this branch here: https://flipperpaenhancementadd-page-l-722nk.squash.io

[loicteixeira]

As discussed on Slack, I added the "need tests" label out of habit, but it doesn't seem that we do have tests for that kind of functionality, and the consensus is that it's not worth it, so I removed the label. Sorry for the confusion.

[FlipperPA]

@loicteixeira No problem at all, I appreciate the diligence. Thanks!