Fixed linking issue due to multiple definitions of ToString and FromString.

Source/DisplayCluster/Private/Misc/DisplayClusterTypesConverter.h

@@ -18,7 +18,7 @@ namespace FDisplayClusterTypesConverter
 	// TYPE --> STRING
 	//////////////////////////////////////////////////////////////////////////////////////////////
 	template <typename ConvertFrom>
-	FString ToString(const ConvertFrom& from);
+	static FString ToString(const ConvertFrom& from);
 
 	template <> FString ToString<> (const FString& from)   { return from; }
 	template <> FString ToString<> (const bool& from)      { return (from ? DisplayClusterStrings::cfg::spec::ValTrue : DisplayClusterStrings::cfg::spec::ValFalse); }
@@ -54,7 +54,7 @@ namespace FDisplayClusterTypesConverter
 	// STRING --> TYPE
 	//////////////////////////////////////////////////////////////////////////////////////////////
 	template <typename ConvertTo>
-	ConvertTo FromString(const FString& from);
+	static ConvertTo FromString(const FString& from);
 
 	template <> FString   FromString<> (const FString& from) { return from; }
 	template <> bool      FromString<> (const FString& from) { return (from == FString("1") || from == DisplayClusterStrings::cfg::spec::ValTrue); }