Update scratch-vm to the latest version 

Update scratch-l10n to the latest version 

chore(package): update scratch-paint to version 0.2.0-prerelease.20180822171824

Remove confirmation dialog when deleting a sprite, costume, or sound.

Fix warnings

chore(package): update scratch-blocks to version 0.1.0-prerelease.1534979688

Update scratch-render to the latest version 

chore(package): update scratch-vm to version 0.2.0-prerelease.20180822215310

- empty MapDispatchToProps (dispatch)
- remove `on…` VM listeners from props passed to wrapped component.

added build mode 'dist' to npm build options

Closes #2938

Closes #2940

Closes #2926

Restore deleted costume

Restore the last deleted sound.

Update language selection menu

chore(package): update scratch-vm to version 0.2.0-prerelease.2018082…

Closes #2917

[Develop] Roll back x/y rounding

Roll back VM to before LLK/scratch-vm#1453. This broke some pen drawing. Resolves #2911.

Overlay a transparent `select` over the language icon. When a user clicks there the options pops up. There’s no styling of the options, other than font and font size.

Add missing propTypes