Make extension help links clickable in modal

Update scratch-blocks to the latest version 

Update scratch-vm to the latest version 

Update scratch-vm to the latest version 

Update upload sprite message

Use pageview with query param for tracking search usage

This replaces the event-based search analytics because that method does not allow us to get the advantages of more search-specific analytics.

Change Remove to Close

Fix project loader cleanup function. Safari does not support the use of .finally

Update scratch-vm to the latest version 

Enable EV3 and micro:bit extensions

Update Toolbox when blocks container updates and is visible.

Call updateToolbox whenever the blocks container updates and is visible so that changes to dynamic menus (e.g. costume renaming) are picked up. Update setLocale to call updateToolbox so that the toolboxRefresh gets re-enabled. This is needed for getting translated toolbox strings like 'Hello' and 'Hmmm...' to stay in sync with language changes.

Update scratch-blocks to the latest version 

Improve search and tutorial instrumentation for preview

Update scratch-l10n to the latest version 

Update scratch-blocks to the latest version 

Prevent react recycling components causing safari render bug

All hail the taco wizard

Update scratch-vm to the latest version 

Don't crash the editor when a project file fails to upload.