fix: ds-839 block modal form submissions

[cdcabrera]

What's included

• fix: ds-839 block modal form submissions

Notes

• leverages existing toast notification layout to aid in preventing modal closing after form submission
• basic blocking for modal forms for
  • Add/Edit source api hooks
  • Add scan api hooks
  • Add/Edit credential api hooks
    • Technically the Edit aspect is still being worked on under refactor(i18n): ds-742 component, test updates #428 this simply adds the Promise.reject when ready
• what this doesn't do
  • enhance the toast notification messages or perform inline form messaging.
  • give some level of loading indicator for the form submission

How to test

Local run check

1. update the NPM packages with $ npm install
2. $ npm run start:stage
3. confirm basic form submission for
   • Add/Edit sources is blocked with a toast notification
   • Adding a scan is blocked with a toast notification
   • Adding a credential is blocked with a toast notification

Example

expected basic toast notifications

Updates issue/story

DISCOVERY-839