Werk #10288: Customer GUI: remove superfluous tt tags

Component	Setup
Title	Customer GUI: remove superfluous tt tags
Date	Oct 24, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0p6 Checkmk MSP (CME) 1.5.0p24 Checkmk MSP (CME)

<tt> tags were used but escaped so they were visible. These tags are now removed.

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