Disable date edit widget for schedules if last day of month is checked

CCBUG: 444262
2 jobs for master in 18 minutes and 9 seconds (queued for 9 seconds)
Status Name Job ID Coverage
  Build
passed build_local_ubuntu_2004 #145659

00:08:00

passed linux kf5-qt5 qt5.15 #145658

00:10:09

27.0%