Add function ApplySafeSubstitution for translation strings with parameters

Common/StringUtils.cpp

@@ -368,3 +368,31 @@ std::string UnescapeMenuString(const char *input, char *shortcutChar) {
 	}
 	return output;
 }
+
+std::string ApplySafeSubstitutions(const char *format, const std::string &string1, const std::string &string2, const std::string &string3) {
+	size_t formatLen = strlen(format);
+	std::string output;
+	output.reserve(formatLen + 20);
+	for (size_t i = 0; i < formatLen; i++) {
+		char c = format[i];
+		if (c != '%') {
+			output.push_back(c);
+			continue;
+		}
+		if (i >= formatLen - 1) {
+			break;
+		}
+		switch (format[i + 1]) {
+		case '1':
+			output += string1; i++;
+			break;
+		case '2':
+			output += string2; i++;
+			break;
+		case '3':
+			output += string3; i++;
+			break;
+		}
+	}
+	return output;
+}