Add loading state when navigating to designs in Design View
When looking at a design in Design view, navigating to another design (using arrow keys or arrow buttons in the UI) doesn't trigger a loading state in the UI even though the navigation isn't instantaneous. See demo below.
Why is this a problem
There is no feedback when the user tries to navigate to a different design - the feedback comes some time after clicking, when the design data has loaded. This may be frustrating for users.
Proposal
Add loading state to Design view comments section and design container, indicating that the design data is being loaded