dashboard: add loading icon for more/less activities link

circle/dashboard/static/dashboard/vm-details.js

@@ -19,6 +19,7 @@ $(function() {
   });
 
   $("#activity-refresh").on("click", "#show-all-activities", function() {
+    $(this).find("i").addClass("fa-spinner fa-spin");
     show_all = !show_all;
     $('a[href="#activity"]').trigger("click");
     return false;
@@ -359,10 +360,14 @@ function checkNewActivity(runs) {
     url: '/dashboard/vm/' + instance + '/activity/',
     data: {'show_all': show_all},
     success: function(data) {
+      if(show_all) { /* replace on longer string freezes the spinning stuff */
+        $("#activity-refresh").html(data['activities']);
+      } else {
         a = unescapeHTML(data['activities']);
         b = changeHTML($("#activity-refresh").html());
         if(a != b)
           $("#activity-refresh").html(data['activities']);
+      }
       $("#ops").html(data['ops']);
       $("#disk-ops").html(data['disk_ops']);
       $("[title]").tooltip();

circle/dashboard/templates/dashboard/vm-detail/_activity-timeline.html

@@ -56,9 +56,9 @@
 <div id="show-all-activities-container">
   <a id="show-all-activities" href="#">
     {% if activities|length > 10 %}
-      <span>{% trans "Show less activities" %}</span>
+      {% trans "Show less activities" %} <i class="fa fa-angle-double-up"></i>
     {% else %}
-      <span>{% trans "Show all activities" %}</span>
+      {% trans "Show all activities" %} <i class="fa fa-angle-double-down"></i>
     {% endif %}
   </a>
 </div>