caps lock key doesn't work in a JTextArea Linux port

The Swing text components do not create upper case keys when the caps lock
key is on, The Notepad demo exhibits this problem.

Using a TextArea instead we see that the caps lock does work and from
printing out the events we do see the capslocks and state field change so
it may be a translation problem with Swing.

The code does include caps lock fixes for other platforms but this does not
seem to make a difference