Werk #12658: Fixed broken caching for host/service/contact groups in the GUI

Component	Setup
Title	Fixed broken caching for host/service/contact groups in the GUI
Date	Jul 12, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0p8 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

This fix might increase the gui performance on installations with lots of groups.

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