roll back to server list page when connection lost for iPhone

Change-Id: I3d7a5ff0918ef63b3455e3acd5c447aa333e76ec

ios/iosremote/iosremote/Communication/CommunicationManager.m

@@ -83,6 +83,7 @@
                                                             otherButtonTitles:NSLocalizedString(@"Help", nil), nil];
                     [message show];
                 });
+                [[self.delegate navigationController] popToRootViewControllerAnimated:YES];
                 [(server_list_vc *)self.delegate startSearching];
             } else {
                 [[self.delegate navigationController] popToRootViewControllerAnimated:YES];