tweaked pen color selector to "HSVA"

src/blocks.js

@@ -1288,7 +1288,7 @@ SyntaxElementMorph.prototype.labelPart = function (spec) {
             );
             part.setContents(['front']);
             break;
-        case '%hsla':
+        case '%hsva':
             part = new InputSlotMorph(
                 null,
                 false,

src/objects.js

@@ -507,14 +507,14 @@ SpriteMorph.prototype.initBlocks = function () {
             only: SpriteMorph,
             type: 'command',
             category: 'pen',
-            spec: 'set pen %hsla to %n',
+            spec: 'set pen %hsva to %n',
             defaults: [['color'], 50]
         },
         changePenHSVA: {
             only: SpriteMorph,
             type: 'command',
             category: 'pen',
-            spec: 'change pen %hsla by %n',
+            spec: 'change pen %hsva by %n',
             defaults: [['color'], 10]
         },
         changeSize: {