TryIt to follow selected schema using oneOf selector

[aleskovets]

TryIt should follow selected request body schema when User selects an option using oneOf dropdown.

Context

Allow user to actually interact with multiple schemas and use it with TryIt.

Current Behavior

Currently only the first schema is pre-loaded and selection of different schema does not make any difference.

Expected Behavior

TryIt should follow selected schema in "Body" section