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

Instead of saving .sb3 files to the projects server, save just the project JSON. Save assets to the assets server. This happens via the asset types being routed to different web sources by storage.

These files have diverged from the versions stored on the assets server due to the way Git handles line endings. Re-save them and keep their line endings from changing again by treating SVGs as binary in this repo.

Fix missing fonts in backpack thumbnails

Remove explicit mention of canUseCloud prop. It will get automatically passed down to the child components.