The focus putback added a hack to JTextArea which allowed the class to load
its default focus traversal keys with a minimum of code. A new static
initializer was added that instantiated an AWT TextArea, read its focus travesal
keys, and cached them for future reference.

There are two major problems with this code:

1. On Solaris, instantiating a TextArea opens a connection to the Xserver. The
nightly build occurs on a headless machine which has no Xserver. Since the
'images' build target generates javadoc for the Swing components, each Swing
component must be statically initialized.

2. This code is not headless-safe. When running with a headless toolkit,
instantiating a JTextArea should be allowed. However, doing so will generate
an ExceptionInInitializerError because a TextArea cannot be instantiated by
a headless toolkit.