Update copyState to reflect new enum values

What does this MR do?

The values of the GraphQL field DesignCollection#copyState changed from PENDING or COPYING to just IN_PROGRESS to represent an in progress Design Collection copy (see !42291 (merged) and !42432 (merged)).

This change updates the frontend to correctly reflect this change so that a message displays when the design copy is in progress.

It also adjusts the padding of the box #13426 (comment 414551182).

QA Steps

1. Enable design_management_copy_designs feature: Feature.enable(:design_management_copy_designs)
2. Add designs to an issue
3. Move the issue
4. You should see a message saying your designs are on their way (the below screenshot)
5. Reloading after a few seconds you should see your designs

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done