Wait for scroll animations correctly 

Prevent loading duplicate extensions

Bring back the 'contains' operator block

Update enzyme-adapter-react-16 to the latest version 

Add block chunking to toolbox xml

Update toolbox before ScratchBlocks inject and Give  IDs to some shadow blocks

Shrink extension button

Use unique costume ID

This reverts commit c177706a.

Remove “top” category

Fix corner radius bug

Give fixed IDs to all monitored blocks

Stop refreshing the toolbox by using new batch update API

The VM refreshWorkspace will eventually lead back to onWorkspaceUpdate,
which will call refreshSelection itself.

Fix sprite position updating the toolbox blocks

Update the costume name from the paint editor

Revert broken performance improvement and add tests

This reverts commit 5b9e8aa0, reversing
changes made to 4cb65dc5.