Imported error reporting when loading presets with option keys

or option values that our poor software does not understand.
This applies to configs added by some forks of slic3r, for example
slic3r++
PrusaSlicer has encountered an error: Failed loading the preset file: #3909

src/libslic3r/Config.cpp

@@ -464,7 +464,7 @@ bool ConfigBase::set_deserialize_nothrow(const t_config_option_key &opt_key_src,
 void ConfigBase::set_deserialize(const t_config_option_key &opt_key_src, const std::string &value_src, bool append)
 {
 	if (! this->set_deserialize_nothrow(opt_key_src, value_src, append))
-		throw BadOptionTypeException("ConfigBase::set_deserialize() failed");
+		throw BadOptionTypeException((boost::format("ConfigBase::set_deserialize() failed for parameter \"%1%\", value \"%2%\"") % opt_key_src % value_src).str());
 }
 
 void ConfigBase::set_deserialize(std::initializer_list<SetDeserializeItem> items)

src/libslic3r/Config.hpp

@@ -56,10 +56,9 @@ class NoDefinitionException : public std::runtime_error
 class BadOptionTypeException : public std::runtime_error
 {
 public:
-	BadOptionTypeException() :
-		std::runtime_error("Bad option type exception") {}
-	BadOptionTypeException(const char* message) : 
-		std::runtime_error(message) {}
+	BadOptionTypeException() : std::runtime_error("Bad option type exception") {}
+	BadOptionTypeException(const std::string &message) : std::runtime_error(message) {}
+    BadOptionTypeException(const char* message) : std::runtime_error(message) {}
 };
 
 // Type of a configuration value.