Bedrock Edition beta 1.16.20.52

Beta 1.16.20.52 is the second build for Bedrock Edition 1.16.20, which will fix a number of bugs with account sign in and multiplayer.

Fixes

 * The player's bounding box that is used for spawning is now the correct size.
 * Fixed an issue that could prevent the Marketplace loading correctly.
 * Fixed an issue that could cause command blocks to stop working unexpectedly.
 * Made using the command more efficient, improving performance.