Updated credits to reflect Michael’s piano keyboard design contribution

gui.js

@@ -3250,7 +3250,7 @@ IDE_Morph.prototype.aboutSnap = function () {
         + '\ncountless bugfixes and optimizations'
         + '\nKartik Chandra: Paint Editor'
         + '\nMichael Ball: Time/Date UI, Library Import Dialog,'
-        + '\ncountless bugfixes and optimizations'
+        + '\nPiano Keyboard design, countless bugfixes and optimizations'
         + '\nBartosz Leper: Retina Display Support'
         + '\nBernat Romagosa: Countless contributions'
         + '\n"Ava" Yuan Yuan, Dylan Servilla: Graphic Effects'

history.txt

@@ -3574,6 +3574,7 @@ Fixes:
 * Blocks, Widgets: Moved PianoKeyboard code to widgets.js
 * Blocks, Widgets: Added sound feedback to PianoKeyboard
 * New file: symbols.js (moved out of blocks.js)
+* Updated credits to reflect Michael’s piano keyboard design contribution
 
 
 Features:

widgets.js

@@ -30,6 +30,11 @@
     needs blocks.js and objects.js
 
 
+    credits
+    -------
+    Michael Ball contributed the first prototype of the piano keyboard
+
+
     I. hierarchy
     -------------
     the following tree lists all constructors hierarchically,