Werk #2531: Fixed graph hover for services containing backslashes

Component	User interface
Title	Fixed graph hover for services containing backslashes
Date	Aug 31, 2015
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i3 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Hovering over the graph icon caused error messages on services containing backslashes (esp. on windows checks)

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