Fix - Grow datagrid height if there's available space #16527
Merged
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What does the pull request do?
Allows DataGrid to grow vertically with items added, if there's available space. Height can still be constrained by Height and MaxHeight properties, or by parent size.
What is the current behavior?
Currently, DataGrid permanently sets content height on the first row layout pass, to the total height of the rows. If items count increases, a scrollbar appears and extra items are hidden. This occurs even if there's enough space to grow in the parent
What is the updated/expected behavior with this PR?
DataGrid no longer estimates the row cells height, as it's now provided by the parent on measure pass.
How was the solution implemented (if it's not obvious)?
Checklist
Breaking changes
Obsoletions / Deprecations
Fixed issues
Fixes #8771