Revert localization of crash message.

Fix errors when dragging in player mode

It doesn't work without an intl provider, which is mounted inside the error boundary.

Update libraries with new version of libgen

Update scratch-blocks to the latest version 

Upload a costume from camera

* Player mode

Add isPlayerOnly property on GUI. Move isFullScreen into mode reducer with isPlayerOnly.

Full screen needs to be a separate prop so that GUI knows what to show when exiting full-screen (either player-only or full editor).

- set `gui-body * {box-sizing: border-box;}` instead of expecting it to be set by the enclosing component/playground, and removed uses of content-box (adjusting sizes as needed) 
- Added `!isPlayerOnly` to the conditions for draggable sprites
- rewrote player example to use player mode.

Add translation to missing strings

Show "Backdrops" instead of "Costumes" in tab text if stage is selected.

Add more UI states (e.g. differentiating between no access, permission granted but video not loaded, video loaded). CSS cleanup.

Move runtime/renderer related code back into the vm io device. Refactor ModalVideoManager to use the video provider.

Refactor Video IO

Protect against showing costume tab for target that does not exist.

Revert "Bring back "Updates to preview modal for release""

Prevent crashes resulting from the editing target not being on the target list.

chore(package): update scratch-blocks to version 0.1.0-prerelease.152…

Closes #1913

Make sound editor buttons unselectable