admin: add confirmation message box on error and some success

admin/static/index.html

@@ -43,6 +43,9 @@
     </nav>
 
     <div class="container">
+      <div class="row" ng-controller="DIWEBoxController">
+	<div ng-repeat="box in boxes" class="alert alert-{{ box.kind }}" ng-cloak><strong ng-if="box.title">{{ box.title }}</strong> {{ box.msg }}</div>
+      </div>
       <div class="row">
 	<div class="col-sm-12" ng-view></div>
       </div>