PIVOT-864: Fix a NullPointerException trying to check a file against the home
directory.  Basically the VFSBrowser component is not in the component hierarchy
of the skin, so we need another way to get to it.  Set an explicit pointer in
the renderers themselves after loading the bxml file.


git-svn-id: https://svn.apache.org/repos/asf/pivot/trunk@1542110 13f79535-47bb-0310-9956-ffa450edef68