get Defaults
Returns the defaults for this SynthLookAndFeel.
OK, this is a hack to work around a bug in the Nimbus Look &Feel. Normally one would use the javax.swing.UIManager.put
method to set the font.
However, Nimbus set's sets its own fonts when the getDefaults() method is called for the first time overwriting any fonts and any other parameters set in the UIManager so you can only configure the Nimbus Look &Feel after it was created. Which is to late.
Return
default value.