Fix merge error that disabled contact drag'n'drop

Thomas Bruederli

2014-08-19 fc52af24f1418d6590a2d37a0d8cc31b123e38f6

 program/include/rcmail_output_html.php

@@ -1176,7 +1176,7 @@

        // generate html code for button
        if ($btn_content) {
            $attrib_str = html::attrib_string($attrib, $link_attrib);
            $attrib_str = html::attrib_string($attrib, array_merge(array('unselectable'), $link_attrib));
            $out = sprintf('<a%s>%s</a>', $attrib_str, $btn_content);
        }