ZEN-13928: new panel
ZEN-13928: typo
ZEN-13928: new fields added
ZEN-13928: adding new options
ZEN-13928: updated MaintenanceWindowInfo
ZEN-13928: fixed MW updating
ZEN-13928: additional fields are now disabled by default
ZEN-13928: added better repeat column to the MW grid
ZEN-13928: fixed dict keys errors
Merge pull request #652 from zenoss/feature/ZEN-13928

ZEN-13928: Ability to schedule maintenance windows by occurrence of a day in the month