Checkmk Werk 12744: Fix required comment field for adhoc downtimes

ID: 12744 Title: Fix required comment field for adhoc downtimes Component: Multisite Level: 1 Class: Bug fix Version: 2.1.0i1 If you used adhoc downtimes in previous 2.0 versions, the downtime could not be send, because the comment field was stated as required after using the button of the configured adhoc downtime.