many styling changes to applets and palettes applet esp.; all applets seeded w. < 3rows bumped to 3 w. new migration in apps.applets; setting palette no longer reloads entire page, only preset background-color vars; two new ITs in apps.dash.tests.ITs.test_views.SetPaletteTest to ensure dash.views functionality fires; unified h2 applet title html structure & styled its text vertically to waste less applet space

src/templates/apps/billboard/billboard.html

@@ -5,14 +5,14 @@
 
 {% block content %}
 <div class="billboard-page">
-    <h2>My Games</h2>
+    <h2>My Scrolls</h2>
     <ul class="game-list">
         {% for room in my_rooms %}
             <li>
                 <a href="{% url 'billboard:scroll' room.id %}">{{ room.name }}</a>
             </li>
         {% empty %}
-            <li><small>No games yet.</small></li>
+            <li><small>No scrolls yet.</small></li>
         {% endfor %}
     </ul>
 </div>