widgets -> cards_x_nodes_x_widgets in graph serialization #11073

[chrabyrd]

Types of changes

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Description of Change

To test just create a new Arches project, and try importing and exporting a graph. Ensure that the serialized graph has cards_x_nodes_x_widgets and not widgets

Issues Solved

Closes #11073

Checklist

• I targeted one of these branches:
  • [x] dev/7.6.x (under development): features, bugfixes not covered below
  • [ ] dev/7.5.x (main support): regressions, crashing bugs, security issues, major bugs in new features
  • [ ] dev/6.2.x (extended support): major security issues, data loss issues
• [ ] I added a changelog in arches/releases
• [ ] I submitted a PR to arches-docs (if appropriate)
• [ ] Unit tests pass locally with my changes
• [ ] I added tests that prove my fix is effective or that my feature works
• [ ] My test fails on the target branch

Accessibility Checklist

Developer Guide

Topic	Changed	Retested
Color contrast
Form fields
Headings
Links
Keyboard
Responsive Design
HTML validation
Screen reader

Ticket Background

• Sponsored by:
• Found by: @
• Tested by: @
• Designed by: @

Further comments

[chrabyrd]

this apparently just happens in 8.0.x 🤔