Uses randomized duration between [0, 2^k-1] where k is the connection attempt number, maxed out at 5.

I had to rework the tests quite a bit to make this easy to test, to work around the timeouts and the randomization.

project-watcher can request eventual callback, or immediately call ca…

Update scratch-vm to the latest version 

Remove the hideIntro override and default preview modal to false

Support multiple commands from cloud data server

Fixing library item height stretch only for extensions.

Progress toward #2389 and #2390.  This puts the right options in the …

saving, creation errors use alerts; alerts css improvements

chore(package): update scratch-blocks to version 0.1.0-prerelease.154…

Resolves #3738: Add RTL layout to new extension library.

Closes #3784

Update scratch-l10n to the latest version 

The use of an "override" prop that allowed the preview modal to be hidden without actually changing the redux state was causing a problem where the block editors where not closing when modals were opening. That is because it relied on the modal reducer being accurate.

I defaulted the preview state to false to make it simpler to consume the GUI, as www will not want the preview info to be true. I made it true in the playground instead.

This fixes https://github.com/LLK/scratch-gui/issues/3710

Create cloud vars

Update scratch-blocks to the latest version 

Handle ?tutorial= query in gui

Save 3.0 project JSON to the project server and assets to the assets server

Hopefully they are actually clarifying