Please propagate service changes to compose file in stack editor

[Daemach]

Is your feature request related to a problem? Please describe.
After deploying a stack with Portainer and making changes to a stack service, these changes are not saved to the stack yaml file. All changes are gone if I have to tear down the stack and redo it for any reason.

Describe the solution you'd like
Update the stack file in the stack editor to reflect those changes.