Fix: Remove the collapsed block warning when expanding a block

[RoboErikG]

The basics

• I validated my changes

The details

Resolves

Fixes #6020

Proposed Changes

• Clears the collapsed block warning message when a block is expanded.
• When collapsing, checks if any children have a warning and if so adds the collapsed warnings warning.

Reason for Changes

The collapsed block warning message was set if any block in a collapsed stack added a warning, but wasn't added if there already was a warning and was never removed making it sticky on the parent even after expanding and deleting the block with the warning.

Test Coverage

Documentation

Additional Information

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[rachel-fenichel]

Code looks fine, but please check if we have any related tests and add one for this case if possible.

[RoboErikG]

Added tests, which required fixing the other bug where warning icons didn't show up right away when a block is collapsed.

[rachel-fenichel]

One quick change then lgtm. I'll manually add the pr: fix label in a sec.