Fix- Issue 1421- PeoplePicker Control - Shows wrong value in Dynamic Form when null is provided & Issue 1578 - DynamicForm - Error on save when clearing person from Person or Group field and leaving it blank.

Fix- Issue 1421- PeoplePicker Control - Shows wrong value in Dynamic Form when null is provided & Issue 1578 - DynamicForm - Error on save when clearing person from Person or Group field and leaving it blank. #2448