Prevent frequently updated components from retaining memory (#4907)

Author: JoviDeCroock

src/component.js

@@ -154,6 +154,7 @@ function renderComponent(component) {
 		newVNode._original = oldVNode._original;
 		newVNode._parent._children[newVNode._index] = newVNode;
 		commitRoot(commitQueue, newVNode, refQueue);
+		oldVNode._parent = oldVNode._dom = NULL;
 
 		if (newVNode._dom != oldDom) {
 			updateParentDomPointers(newVNode);