Display a warning if popup window was blocked (#1489618)

Aleksander Machniak

2014-05-30 b408e0bc532e6023248c6671c5cef52d1c06f3f3

 program/include/rcmail.php

@@ -428,7 +428,8 @@
        }

        // add some basic labels to client
        $this->output->add_label('loading', 'servererror', 'connerror', 'requesttimedout', 'refreshing');
        $this->output->add_label('loading', 'servererror', 'connerror', 'requesttimedout',
            'refreshing', 'windowopenerror');

        return $this->output;
    }