Werk #14753: Fix possible TypeError on views

Component	User interface
Title	Fix possible TypeError on views
Date	Sep 12, 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 2.1.0p12 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0p29 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

If you used views like "Host groups" with column "Hosts colored according to state" and without column "Host alias" an error like "TypeError: unhashable type: 'list'" occurred.

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