Nicer crash message format

Fix the GUI not updating when new project data is available

chore(package): update scratch-paint to version 0.2.0-prerelease.2018…

to target pane, which already has all the needed props.

Closes #1521

This reverts commit 0a741b10.

Should help with smaller screen sizes, where the ratio is different (like some chromebooks)

fixes #1205.

It doesn’t translate any of the text to avoid a case where translation is causing the error, and fails in the error boundary as well.

Block drag

SB2 Import Modal

Asset menu follow ups

I also suspect this will fix some of the times when the menu
mysteriously stayed open, because it was being re-rendered for by
mistake.

Add new asset menu system

This makes it possible to use on iOS/touch

Duplicate costume

Add duplicate button. Pass the costume ID to paint (the previous costume ID used matches when duplicate is used.) When switching to the costume tab, open the current costume.