OOP tweaks

blocks.js

@@ -1370,7 +1370,7 @@ SyntaxElementMorph.prototype.labelPart = function (spec) {
                 'shadowedVariablesMenu',
                 true
             );
-            part.isStatic = true;
+            // part.isStatic = true;
             break;
         case '%lst':
             part = new InputSlotMorph(

threads.js

@@ -1604,6 +1604,7 @@ Process.prototype.doDeleteAttr = function (attrName) {
                 xPosition: 'x position',
                 yPosition: 'y position',
                 direction: 'direction',
+                getCostumeIdx: 'costume #',
                 size: 'size'
             }[name.expression.selector];
             if (!isNil(name)) {