Creating a new Dataset without assigning it to a Project places it in all Projects

[spco]

Is there an existing issue for this?

• [X] I have searched the existing issues

Current Behavior

Creating a new Dataset without assigning it to a Project places it in all Projects.

Expected Behavior

The form should show an error and refuse to create the Dataset until at least one Project is created.

Steps To Reproduce

This was replicated on the dev system below:

After selecting "Add new Dataset", the Project is added to all Projects (or possibly all the Projects the user is in - I've not been able to very).

Environment

- OS:
- Other environment details:

I'm part of a Project Team

No response

Anything else?

No response

Are you willing to contribute to resolve this issue?

🎨 Yes, I'm keen to be involved in design discussions.

[spco]

Also to note: on the Dataset Details page, a Dataset can have all of its Projects removed. It then becomes unviewable. This shouldn't be possible - the Dataset Details page should error if attempting to remove the last Project from a Dataset.

[AndyRae]

Should be fixed in #774