Support dropping Stacks on Cards or other Stacks #1428

Job	Run time
Quality Check	5m 8s
Unit Tests	4m 1s
Build for Android	7m 9s
Build for iOS	4m 2s
Build for StandaloneLinux64	4m 31s
Build for StandaloneOSX	0s
Build for WebGL	6m 4s
Deploy to the Mac App Store	0s
Build for ${{ matrix.targetPlatform }}	0s
Deploy to the Web via Firebase	0s
Deploy to the Google Play Store	0s
Deploy to the App Store	0s
Deploy to the Steam Marketplace	0s
Deploy to the Microsoft Store	0s
Announce Release to Social Media	0s
	30m 55s

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