Checkmk Werk 15373: time_period: disallow builtin timeperiod as the exclude option

ID: 15373 Title: time_period: disallow builtin timeperiod as the exclude option Component: config Level: 1 Class: Bug fix Version: 2.2.0b1 This werk fixes an issue where the user could via the gui interface, select the builtin time period 24X7 as the timeperiod to exclude in a custom time period. This is no longer possible. If there are no other time periods to select, the exclude option will not be shown.