Werk #15934: Fix selection for downtime commands

Component	User interface
Title	Fix selection for downtime commands
Date	Aug 9, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0p8 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p33 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Werk #15925 should have fixed the selection already but did not work as intended in all environments.

The selection for removing and editing downtimes will now be shown as expected.

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