Pass current editing target to getBlocksXML

src/containers/blocks.jsx

@@ -338,7 +338,7 @@ class Blocks extends React.Component {
             const stageCostumes = stage.getCostumes();
             const targetCostumes = target.getCostumes();
             const targetSounds = target.getSounds();
-            const dynamicBlocksXML = this.props.vm.runtime.getBlocksXML();
+            const dynamicBlocksXML = this.props.vm.runtime.getBlocksXML(target);
             return makeToolboxXML(target.isStage, target.id, dynamicBlocksXML,
                 targetCostumes[targetCostumes.length - 1].name,
                 stageCostumes[stageCostumes.length - 1].name,