Help test nb200a

[Patryk_F]

We can test another version with new fixes:

Help test nb200b

Hello all, ai2-test.appinventor.mit.edu has been updated with the following bug fixes: Fix an issue where block changes would not propagate to a connected companion Fix an issue where deleting some blocks would not get recorded on the undo stack/trash can Fix an issue where deleting an extension would not immediately save the project, potentially causing an internally inconsistent project state Fix an issue where shifting the workspace could trigger a save even though nothing changed This re…