new applet structure for apps.billboard, incl. My Scrolls, Contacts & Most Recent applets; completely revamped _billboard.scss, tho some styling inconsistencies persist; ensured #id_billboard_applets_container inherited base styles found in _applets.scss; a pair of new migrations in apps.applets to support new applet models & fields; billboard gets its first ITs, new urls & views; pair of new FT classes in FTs.test_billboard

src/templates/apps/billboard/_partials/_applets.html

@@ -0,0 +1,27 @@
+<div id="id_billboard_applets_container">
+    <div id="id_billboard_applet_menu" style="display:none;">
+        <form
+            hx-post="{% url "billboard:toggle_applets" %}"
+            hx-target="#id_billboard_applets_container"
+            hx-swap="outerHTML"
+        >
+            {% csrf_token %}
+            {% for entry in applets %}
+                <label>
+                    <input
+                        type="checkbox"
+                        name="applets"
+                        value="{{ entry.applet.slug }}"
+                        {% if entry.visible %}checked{% endif %}
+                    >
+                    {{ entry.applet.name }}
+                </label>
+            {% endfor %}
+            <div class="menu-btns">
+                <button type="submit" class="btn btn-confirm">OK</button>
+                <button type="button" class="btn btn-cancel applet-menu-cancel">NVM</button>
+            </div>
+        </form>
+    </div>
+    {% include "apps/applets/_partials/_applets.html" %}
+</div>