The right-click context menu of Kolab webmailer takes full height:
- Skin "plesk" is used for Kolab Webmailer:
# grep -e skin /etc/roundcubemail/config.inc.php
$config['skin'] = "plesk";
Bug in theme package of Kolab webmailer extension, which is planned to be fixed in future updates.
Until the update is available as a temporary workaround the following can be applied:
Warning: The following changes will be reverted after Kolab theme packages are updated on the server