Merge develop to smoke for testing

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 

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.

Refactor cloud manager hoc to use component lifestyle methods to control cloud connection. Abstract our connection creation logic into a funciton. Make canUseCloud check a function.

Co-Authored-By: kchadha <kchadha@media.mit.edu>

Also pull out `onUpdateReduxDeck` prop out to avoid warning when it’s passed to nested components.

Update scratch-paint to the latest version 

Moved the tutorial id handling into gui so it works when gui is embedded in www as well as standalone.

This seemed better than adding the same query handling to www, in order to pass an id to gui.

Note, the `?tutorial=all` handling remains in app-state-hoc. Currently it’s only needed in standalone mode for Hour of Code. It’s easy to move into the gui container if we do want it in gui by default.

Monitor save load

Save and load monitor position information. When the monitor is auto-positioned or dragged, a new location should be recorded in the monitor data.

Filter for letters in the sprite/costumes libraries

Prevent crash after deleting sprite that had been highlighted

added author-info, user-avatar components