Werk #13070: Fix XSS in edit roles

Component	Setup
Title	Fix XSS in edit roles
Date	Aug 30, 2021
Level	Trivial Change
Class	Security Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0p10 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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