Export Portable Project always exports devices as local

[Pcrossley69]

Describe the bug
When exporting a portable project a zipped GNS3 project fie is created.
This contains a projec.gns3 file that describes the project.

Nodes in this file contain descriptions that include information of the form:
"nodes": [{"compute_id": "local",

This is true even if the project is being exported from a vm.

Consequently whenever I export a portable project, I have to do a global search and replace in this file replacing
"compute_id": "local" with "compute_id": "vm"

It seems to me that the default action should be to set the compute_id to match where you export from
At the very least docker containers should default to vm as they won't run locally.

Another possibility would be to offer a choice when the export starts "vm" or "local"

GNS3 version and operating system (please complete the following information):

• OS: Windows 10 22H2
• GNS3 version 2.2.44.1
• Any use of the GNS3 VM or remote server: VNWARE vm

To Reproduce
Steps to reproduce the behavior:

1. Open a project
2. Dont start anything
3. Use File->Export Portable Project
4. Use File Import Portable project to import with a new name
5. Any items that were on the vm will try to load to the local server !

[grossmj]

I have added the option "Keep the original compute IDs" in Export Portable Project. That should solve your issue.