Sandbox: Flag enum content is not displayed in 'View' mode about oat HOT 4 CLOSED

Partial fix currently exists in OAT repo branch: da/component-update, but set functionality hasn't been updated yet.

Modified FlagsInput.razor to still create checkboxes in cases where the flag enum member is null

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Modified FlagsInput.razor to still create checkboxes in cases where the flag enum member is null

This is probably the wrong approach. This should be covered by the set to null checkbox already.

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According to official documentation the way to check if a type is nullable is

Nullable.GetUnderlyingType(type) != null

https://docs.microsoft.com/en-us/dotnet/api/system.nullable.getunderlyingtype?view=net-5.0

However, this does not appear to work for Enums, and this method will instead return null. I've verified this behavior directly in OAT so it is not an ASA issue. Unfortunately, it doesn't seem viable to de-nullable the Enums in Attack Surface Analyzer as null is a valid value for them (some of the enums are only valid on windows systems and the flags are passed through.)

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I've narrowed this problem down to only Enums that start as null. Enums that are nullable but don't start as null now work.

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