U2: Fix bug when rendering a dynamic value that returns an array not removing the old children.
U2: Fix bug when rendering a dynamic value that returns an array not removing the old children.

foam-framework/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam