[BUGS nb200] App Inventor inutilisable (unusable)

[ewpatton]

An assortment of bug fixes are now available on the test server:

Help test nb200a

Hello everyone, ai2-test.appinventor.mit.edu has been updated with a set of fixes for bugs identified in nb200: Adjust autoscrolling behavior to be a function of the pointer not the block bounding box Fix an issue where the "Do It" bubble would update contents but not appear Fix an issue where procedure argument names would show as "undefined" Fix an issue where extension blocks in the backpack would cause it to not render correctly Fix an issue where every move of the workspace would cause t…