Werk #14456: Fix operators in filter popup

Component	User interface
Title	Fix operators in filter popup
Date	Jun 23, 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)

If a view used filter with operators like "=" or "≠" (e.g. the "Host Tags" filter), the value of the operator was empty when opening the filter popup.

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