[2.3.0] Checkmk Werk 17184 created: Generic Printer: IO Unit State - Allow to not impose any levels

[//]: # (werk v2) # Generic Printer: IO Unit State - Allow to not impose any levels key | value ---------- | --- date | 2024-07-24T10:13:35+00:00 version | 2.3.0p12 class | fix edition | cre component | checks level | 1 compatible | yes The plugins "_Generic Printer: Input Unit State_" and "_Generic Printer: Output Unit State_" did not allow to configure no levels, but to always be ok.