[Windows] Set CanDrag
and AllowDrop
only if needed
#22640
Merged
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Description of Change
This PR makes it so that
_container.CanDrag
and_container.AllowDrop
are not set unnecessarily. The PR assumes that most of UI elements are not draggable and droppable by default.Speedscope
-> ~9% improvement
Issues Fixed
Contributes to #21787