Add check for default workflow

[jelliotartz]

Describe your changes

• Adds a check for presence of configuration attribute (where default_workflow is stored) on a project before conditionally rendering an asterisk next to the default workflow on the admin/project-status page.
  • If no default workflow is set, it will display 'No workflows found' (same behavior as before this PR), but now should throw no errors in the console or interfere with the UI.
  • Issues were found with toggles freezing on new projects that have no default workflow set. (tagging @mrniaboc here for reference).
• Staged here.
• Related: Workflow default dialog alert #4100.

Review Checklist

• Does it work in all major browsers: Firefox, Chrome, Edge, Safari?
• Does it work on mobile?
• Can you rm -rf node_modules/ && npm install and app works as expected?
• Did you deploy a staging branch?
• If the component is in coffeescript, is it converted to ES6? Is it free of eslint errors? Is the conversion its own commit?
• Are the tests passing locally and on Travis?

Optional

• Have you replaced any ChangeListener or PromiseRenderer components with code that updates component state?
• If changes are made to the classifier, does the dev classifier still work?
• Have you resized and compressed any image you've added?
• Have you added in flow type annotations?
• Have you followed the Springer guidelines for commit messages?

[jelliotartz]

PR Update

Was able to produce the same error (can't read property default_workflow of undefined) in the console when attempting to toggle the workflow active setting of a test project with one workflow and no default_workflow set - so adding a check for this.state.project.configuration in the handleToggle function to handle this use case.

[srallen]

Can this be rebased with master? Other than that, it looks ready to go. Thanks!

[jelliotartz]

Rebased :)

[srallen]

@jelliotartz Would you be up for writing unit tests for the project status page? Not a high priority, but another thing to do if you have time. Thanks!

[jelliotartz]

sure, will do!