Revert "Replaced ToMinSignificantDigits with ToXmlFormat in XMLVTPReports"

This reverts commit 047c3c89.

VectoCore/VectoCore/OutputData/XML/DeclarationReports/VTPReport/XMLVTPReport.cs

@@ -297,11 +297,11 @@ namespace TUGraz.VectoCore.OutputData.XML
 					),
 					new XElement(
 						tns + "Declared", new XAttribute(XMLNames.Report_Results_Unit_Attr, key),
-						declaredCO2.ToXMLFormat( 2)
+						declaredCO2.ToMinSignificantDigits(3, 2)
 					),
 					new XElement(
 						tns + "Verified", new XAttribute(XMLNames.Report_Results_Unit_Attr, key),
-						verifiedCO2.ToXMLFormat( 2)
+						verifiedCO2.ToMinSignificantDigits(3, 2)
 					)
 				),
 				new XElement(tns + "C_VTP", cVtp.ToXMLFormat(4)));