Werk #14338: Fix service level filter

Component	User interface
Title	Fix service level filter
Date	Jun 22, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.1.0p4 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0p27 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

The filter "Host service level" and "Service service level" returned wrong results.

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