Play sound vs. play sound until done

[jwzimmer-zz]

During the Catch Game External Playtest (June 2017), at least one user had difficulty understanding why the sounds didn't seem to be playing inside their loop. The issue was that they had several "play sound" blocks in a loop that was often triggered, so although the sounds were started, they didn't finish playing before other sounds covered them up (so the user couldn't identify that they were really "playing").

We have seen a lot of people encounter this issue. : )

Related to #447.

Alternatives: "start sound"?

[jwzimmer-zz]

We changed "play sound" to "start sound", we'll see how it goes in the next external playtest. (Change is already implemented, we still want to see how it goes though.)

/cc @paulkaplan