refactor: improve error handling and display in core_exit.sh and install_config.sh

- In core_exit.sh, added a check to set exit code to 4 if it is not already set.
- In install_config.sh, improved the display of missing config file by highlighting the file path.

These changes aim to enhance the error handling and provide clearer information to users.

lgsm/modules/core_exit.sh

@@ -35,7 +35,9 @@ elif [ "${exitcode}" != "0" ]; then
 	elif [ "${exitcode}" == "3" ]; then
 		fn_script_log_warn "${moduleselfname} exiting with code: ${exitcode}"
 	else
+		# if exit code is not set assume error.
 		fn_script_log_warn "${moduleselfname} exiting with code: ${exitcode}"
+		exitcode=4
 	fi
 	fn_exit_dev_debug
 	# remove trap.

lgsm/modules/install_config.sh

@@ -154,7 +154,7 @@ fn_list_config_locations() {
 		elif [ -d "${servercfgfullpath}" ]; then
 			echo -e "Game Server Config Dir: ${servercfgfullpath}"
 		else
-			echo -e "Config file: ${red}${servercfgfullpath} (${red}FILE MISSING${default})"
+			echo -e "Config file: ${red}${servercfgfullpath}${default} (${red}FILE MISSING${default})"
 		fi
 	fi
 	echo -e "LinuxGSM Config: ${lgsmdir}/config-lgsm/${gameservername}"