Queue up messages to send ot the cloud server which accumulate before 
the connection is ready. Add tests for new/updated functionality.

Set VM's cloud provider to null when disconnecting from the cloud server. Add unit test for disconnecting on unmount.

Fix cloud connection logic so that cloud connections are made and cleared out appropriately. This fixes a bug where we were making two cloud connections when creating a new project and not clearing out previous connections when switching between editor and preview/player mode.

Refactor cloud manager hoc to use component lifestyle methods to control cloud connection. Abstract our connection creation logic into a funciton. Make canUseCloud check a function.

Move cloud connection logic into its own HOC and add canUseCloud flag to control whether to show the new cloud variable options in the variable modal.