Fix Sprints Spinner

app/coffee/modules/backlog/sprints.coffee

@@ -141,7 +141,7 @@ ToggleExcludeClosedSprintsVisualization = ($rootscope, $loading) ->
     link = ($scope, $el, $attrs) ->
         # Event Handlers
         $el.on "click", "", (event) ->
-            $loading.start($el.siblings('.load'))
+            $loading.start($el.parent().siblings('.loading-spinner'))
             $rootscope.$broadcast("backlog:toggle-closed-sprints-visualization")
 
         $scope.$on "$destroy", ->
@@ -149,7 +149,7 @@ ToggleExcludeClosedSprintsVisualization = ($rootscope, $loading) ->
 
         $scope.$on "sprints:loaded", (ctx, sprints) =>
             closedSprints = _.filter(sprints, (sprint) -> sprint.closed)
-            $loading.finish($el.siblings('.load'))
+            $loading.finish($el.parent().siblings('.loading-spinner'))
 
             #TODO: i18n
             if closedSprints.length > 0

app/partials/includes/modules/sprints.jade

@@ -18,7 +18,7 @@ section.sprints
     a.filter-closed-sprints(href="", ng-show="totalClosedMilestones")
         span.icon.icon-archive
         span(tg-backlog-toggle-closed-sprints-visualization="ctrl.excludeClosedSprints") Show closed sprints
-        span.load
+    div.loading-spinner
 
     div.sprint.sprint-closed(ng-repeat="sprint in closedSprints track by sprint.id" tg-backlog-sprint="sprint", tg-sprint-sortable)
         include sprint

app/styles/modules/backlog/sprints.scss

@@ -24,11 +24,15 @@
             margin-right: .3rem;
             vertical-align: middle;
         }
-        .load {
-            display: inline-block;
-            margin-left: .3rem;
-            vertical-align: middle;
     }
+    .loading-spinner {
+        @extend %loading-spinner;
+        border: 0;
+        flex-grow: 0;
+        margin-bottom: 1rem;
+        max-height: 2rem;
+        max-width: 2rem;
+        transform-origin: center center;
     }
     .sprint-name {
         a {