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 Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p4 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0p27 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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

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