Werk #13191: Fix XSS in conditions

Component	Setup
Title	Fix XSS in conditions
Date	Aug 31, 2021
Level	Trivial Change
Class	Security Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

To the list of all Werks