let the upload notification stick for a couple of seconds

Signed-off-by: Florian Kraft <f.kraft@finn.de>

frontend/app/work_packages/services/index.js

@@ -77,5 +77,6 @@ angular.module('openproject.workPackages.services')
     'I18n',
     'NotificationsService',
     '$q',
+    '$timeout',
     require('./work-package-attachments-service')
   ]);

frontend/app/work_packages/services/work-package-attachments-service.js

@@ -26,7 +26,7 @@
 // See doc/COPYRIGHT.rdoc for more details.
 //++
 
-module.exports = function(Upload, PathHelper, I18n, NotificationsService, $q) {
+module.exports = function(Upload, PathHelper, I18n, NotificationsService, $q, $timeout) {
   var currentUploads = [];
 
   var upload = function(workPackage, files) {
@@ -55,7 +55,11 @@ module.exports = function(Upload, PathHelper, I18n, NotificationsService, $q) {
 
     var notification = NotificationsService.addWorkPackageUpload(message, uploads);
     currentUploads.push(notification);
-    $q.all(uploads).then(function() { NotificationsService.remove(notification); });
+    $q.all(uploads).then(function() {
+      $timeout(function() {
+        NotificationsService.remove(notification);
+      }, 700);
+    });
   },
   getCurrentNotification = function(notification) {
     return _.find(currentUploads, notification);