Himanshi Goyal

## Description Made calendar in parity with the WinUI. Old Calendar:  Updated Calendar:  ## Regression NA ## Testing Local build passed, tested sample app. ## Risk NA ######...

[API Proposal]: Simplify Grid Column and Row Definitions

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### Background and motivation Following up on discussion in #5612 and #1739 this proposal is to simplify the definition syntax of RowDefinitions and ColumnDefinitions by: - Allowing rows and columns...