Add switching to costumes tab to surprise button also. All backdrop adding buttons should switch tabs.

Send flag to vm to indicate that mouse-up event was also the end of a drag. VM should use this flag to selectively activate the sprite click hat.

Swapping out default project with sb3 version. This will be refined as the sb3 spec gets fleshed out.

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

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.

This use of shouldComponentUpdate is wrapping the incorrect use of bind
in the mapStateToProps call.

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.

This makes it possible to use on iOS/touch