(fix) hide the detail view when we have nothing to show

UI/WebServerResources/js/ContactsUI.js

@@ -112,6 +112,7 @@
       // $scope functions
       $scope.select = function(folder) {
         $scope.editMode = false;
+        $rootScope.card = null;
         $state.go('app.addressbook', {addressbookId: folder.id});
       };
       $scope.newAddressbook = function() {

UI/WebServerResources/js/MailerUI.js

@@ -196,6 +196,7 @@
           return;
         $rootScope.currentFolder = folder;
         $scope.editMode = false;
+        $rootScope.message = null;
         $state.go('mail.account.mailbox', { accountId: account.id, mailboxId: encodeUriFilter(folder.path) });
       };
       $scope.saveFolder = function(folder) {