Add setting flag to enable bool -> int config file load conversion

src/settings_internal.h

@@ -35,6 +35,7 @@ enum SettingFlag : uint32 {
 	SF_GUI_VELOCITY            = 1 << 18, ///< setting value is a velocity
 	SF_GUI_ADVISE_DEFAULT      = 1 << 19, ///< Advise the user to leave this setting at its default value
 	SF_ENUM_PRE_CB_VALIDATE    = 1 << 20, ///< Call the pre_check callback for enum incoming value validation
+	SF_CONVERT_BOOL_TO_INT     = 1 << 21, ///< Accept a boolean value when loading an int-type setting from the config file
 };
 DECLARE_ENUM_AS_BIT_SET(SettingFlag)