Werk #5428: NagVis: Updated to 1.9.4

Component	NagVis
Title	NagVis: Updated to 1.9.4
Date	Oct 30, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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