Error when running a workflow with missing node that is disconnected from the main graph

### Feature Idea

When I run a workflow that is not connected to the main graph that has my SaveImage node, it still prevents the execution of the workflow. This is an annoying and arbitrary restrictions which puts barriers and extra steps into my work environment. If there is no mechanism to determine what is the "main graph" then please add an option in the error popup to ignore and continue, acting as if the nodes were disabled/silenced (CTRL-M) along with a permanent option.

### Existing Solutions

_No response_

### Other

_No response_