users: show error if update failed

src/views/users.html

@@ -119,6 +119,8 @@
         </div>
 
         <form name="useredit_form" role="form" ng-submit="useredit.submit()" autocomplete="off">
+          <p class="has-error text-center" ng-show="useredit.error.generic">{{ useredit.error.generic }}</p>
+
           <div class="form-group" ng-hide="useredit.source" ng-class="{ 'has-error': (useredit_form.displayName.$dirty && useredit_form.displayName.$invalid) || (!useredit_form.displayName.$dirty && useredit.error.displayName) }">
             <label class="control-label">Display Name</label>
             <div class="control-label" ng-show="(!useredit_form.displayName.$dirty && useredit.error.displayName) || (useredit_form.displayName.$dirty && useredit_form.displayName.$invalid) || (!useredit_form.displayName.$dirty && useredit.error.displayName)">

src/views/users.js

@@ -257,6 +257,7 @@ angular.module('Application').controller('UsersController', ['$scope', '$locatio
                         $scope.useredit_form.email.$setPristine();
                         $('#inputUserEditEmail').focus();
                     } else {
+                        $scope.useredit.error.generic = error.message;
                         console.error('Unable to update user:', error);
                     }