Add troubleshooting documentation

Update scratch-vm

chore(package): update scratch-l10n to version 3.2.20190424151256

update scratch-blocks version

Update scratch-blocks to the latest version 

Closes #4770

Fix Vernier branding (“Go Direct”)

Allow GUI consumer to receive a function for triggering saves.

Remove unneeded feedback button in menubar

Update scratch-render to the latest version 

Move projectChanged into HOC wrapping MenuBar, to avoid unnecessary renders

Add Boost extension assets

Update scratch-svg-renderer to the latest version 

Use the same implementation as onSetProjectThumbnailer which does the same thing for getting a thumbnail externally.

It is no longer needed, as the playground is no longer the public face of scratch gui

removed confirm prompt if you are editing someone else's project and then do file -> upload

chore(package): update scratch-l10n to version 3.2.20190417195644

chore(package): update react-intl to version 2.8.0

chore(package): update scratch-vm to version 0.2.0-prerelease.2019041…

Closes #4740

Update scratch-paint to the latest version 

Hotfix/asset id null

Closes #4746