Skip already acknowledged notifications on clear

src/views/notifications.html

@@ -2,7 +2,7 @@
 <div class="content">
 
   <div class="text-left">
-    <h1>Notifications <button class="btn btn-primary btn-outline pull-right" ng-click="notifications.clearAll()"><i class="fa fa-check"></i> Clear All</button></h1>
+    <h1>Notifications <button class="btn btn-primary btn-outline pull-right" ng-click="notifications.clearAll()" ng-disabled="clearAllBusy"><i class="fa fa-circle-notch fa-spin" ng-show="clearAllBusy"></i><i class="fa fa-check" ng-hide="clearAllBusy"></i> Clear All</button></h1>
   </div>
 
   <div class="col-lg-12 text-center" ng-show="notifications.busy">

src/views/notifications.js

@@ -5,6 +5,8 @@
 
 angular.module('Application').controller('NotificationsController', ['$scope', 'Client', function ($scope, Client) {
 
+    $scope.clearAllBusy = false;
+
     $scope.notifications = {
         notifications: [],
         activeNotification: null,
@@ -54,14 +56,15 @@ angular.module('Application').controller('NotificationsController', ['$scope', '
         },
 
         clearAll: function () {
-            $scope.notifications.busy = true;
+            $scope.clearAllBusy = true;
 
             asyncForEach($scope.notifications.notifications, function (notification, callback) {
+                if (notification.acknowledged) return callback();
                 $scope.notifications.ack(notification, callback);
             }, function (error) {
                 if (error) console.error(error);
 
-                $scope.notifications.busy = false;
+                $scope.clearAllBusy = false;
             });
         }
     };