enable piano keyboard menu to work with textual values representable as numbers

HISTORY.md

@@ -40,6 +40,7 @@
 * BYOB: new experimental feature: special context-aware drop-down menus for custom blocks
 * BYOB: identify multi-line input slots by the pilcrow symbol in the slot editor
 * BYOB: support default values in multi-line input slots inside custom blocks
+* Blocks: enable piano keyboard menu to work with textual values representable as numbers
 
 ### 2019-02-01
 * BYOB: new experimental feature: special multi-line and monospaced input slot types

snap.html

@@ -6,7 +6,7 @@
         <link rel="shortcut icon" href="src/favicon.ico">
         <script type="text/javascript" src="src/morphic.js?version=2019-01-10"></script>
         <script type="text/javascript" src="src/widgets.js?version=2018-10-02"></script>
-        <script type="text/javascript" src="src/blocks.js?version=2019-01-28"></script>
+        <script type="text/javascript" src="src/blocks.js?version=2019-02-04"></script>
         <script type="text/javascript" src="src/threads.js?version=2019-01-28"></script>
         <script type="text/javascript" src="src/objects.js?version=2019-01-28"></script>
         <script type="text/javascript" src="src/gui.js?version=2019-01-28"></script>

src/blocks.js

@@ -148,7 +148,7 @@ CustomCommandBlockMorph, SymbolMorph, ToggleButtonMorph, DialMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.blocks = '2019-January-28';
+modules.blocks = '2019-February-04';
 
 var SyntaxElementMorph;
 var BlockMorph;
@@ -8914,7 +8914,7 @@ InputSlotMorph.prototype.pianoKeyboardMenu = function () {
         this.right() - (menu.width() / 2),
         this.bottom()
     ));
-    menu.selectKey(this.evaluate());
+    menu.selectKey(+this.evaluate());
 };
 
 InputSlotMorph.prototype.setChoices = function (dict, readonly) {