Werk #17518: Perfometers: correctly render negative values

Component	Checks & agents
Title	Perfometers: correctly render negative values
Date	Jan 16, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.3.0p25 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Perfometers displaying a negative value have always been rendered empty.

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