delegate (quasi-inherit) Stage>>newSoundName() from Sprite

HISTORY.md

@@ -21,6 +21,7 @@
 * threads: generate stereo sounds
 * threads: added list type assertion for samples to "new sound" primitive
 * objects: tweaked labels for "new costume" and "new sound" primitives
+* objects: delegate (quasi-inherit) Stage>>newSoundName() from Sprite
 
 ### 2019-10-18
 * objects, blocks, threads: added dimension getters for the stage

src/objects.js

@@ -9012,6 +9012,9 @@ StageMorph.prototype.resumeAllActiveSounds = function () {
 StageMorph.prototype.reportSounds
     = SpriteMorph.prototype.reportSounds;
 
+StageMorph.prototype.newSoundName
+    = SpriteMorph.prototype.newSoundName;
+
 // StageMorph volume
 
 StageMorph.prototype.setVolume