Werk #14470: Fix host label search in monitoring search and quicksearch

Component	User interface
Title	Fix host label search in monitoring search and quicksearch
Date	Aug 16, 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 2.1.0p10 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

If host labels were searched with "hl:" prefix in previous 2.1 versions, no search results were found, even if the search matched.

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