[Renderer] Don't rewrite bool properties if JSON roundtrip is enabled to allow data binding of those properties in the designer #4351
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Related Issue
Fixes #4261
Description
Data binding support in the designer is currently limited. There are areas where it won't work as expected. A larger work item is planned in the future to bring full, comprehensive dat binding support to the designer, but in the meantime there are quite a few limitations. Binding to boolean properties is (well, was before this PR) one of limitations, but others exist.
With this PR, unset (undefined) boolean properties are not removed anymore from the output payload generated by card.toJSON, which in turn allows for whatever value was in the originally parsed payload to remain in the output (such as a binding expression.)
How Verified
Verified manually in adaptivecards-designer-app
Microsoft Reviewers: Open in CodeFlow