6708549 : Nimbus L&F: JTextArea does not repaint of focus gained/lost
Need to make JTextArea repaint its self when focus is gained/lost in the same way as JTextField does. This problem can easily be seen by tabing to change focus between two JTextAreas in Laffy, the focus outer glow does not move correcty.
SynthTextAreaUI was not repainting on focus gained/lost like SynthTextFieldUI was. So I copied the code across.