Use new funcs in other modules

src/Utils/Utils.cpp

@@ -10,7 +10,7 @@ namespace Utils
 		if (mimeType)
 		{
 			std::wstring wMimeType(mimeType);
-			return std::string(wMimeType.begin(), wMimeType.end());
+			return String::Convert(wMimeType);
 		}
 
 		return "application/octet-stream";

src/Utils/WebIO.cpp

@@ -408,7 +408,7 @@ namespace Utils
 			replace = "\\";
 		}
 
-		while ((nPos = path.find(find)) != std::wstring::npos)
+		while ((nPos = path.find(find)) != std::string::npos)
 		{
 			path = path.replace(nPos, find.length(), replace);
 		}