Clones should inherit volume

[apple502j]

Originally reported at https://scratch.mit.edu/discuss/post/3089454/ by Mr-Dave_test

Expected behavior

Clones should inherit volume

Actual behavior

They don't inherit.

Steps to reproduce

https://preview.scratch.mit.edu/#220931369
This should work like
https://scratch.mit.edu/projects/220931369

Operating system and browser

I could repro it
Windows 7 HomePremium 64bit SP1
Firefox 59.0.3

Original info:
My browser / operating system: Windows 7, Chrome 66.0.3359.139, Flash 29.0 (release 0)