Remove animation on prefers-reduced-motion/low referesh rate devices

Also normalises handling of asset list cable table & improves its use of space on large devices

versioning/templates/activity_feed.html

@@ -1,12 +1,15 @@
 {% block js %}
 {% include 'partials/version_scripts.html' %}
 <script>
+  const matches = window.matchMedia("(prefers-reduced-motion: reduce)").matches || window.matchMedia("(update: slow)").matches;
+  //TODO Maybe this should be a reduce rather than remove
+  dur = matches ? 0 : 'slow';
   $(document).ready(function() {
     $(function () {
         $( "#activity" ).hide();
         $( "#activity" ).load( "{% url 'activity_feed' %}", function() {
-          $('#activity_loading').slideUp('slow',function(){
-              $('#activity').slideDown('slow');
+          $('#activity_loading').slideUp(dur,function(){
+              $('#activity').slideDown(dur);
           });
           var whiteList = $.fn.tooltip.Constructor.Default.whiteList
           whiteList.ins = []