MEDIUM: Added possibility to restrict the preferred size of the
tabbedpane to the size of the currently selected index rather than all
contained components. Can be useful for embedded tabbedpane's such as
GRTab's.
LOW / Fixed NPE
MEDIUM / Added possibility to restrict the preferred size of the
tabbedpane to the size of the currently selected index rather than all
contained components. / Use it in all 'GRTab's
LOW / Fixed BackgroundStylePanel
IMPORTANT / Attempt to set allowsNull to false by default (please report
any regressionon that point, everywhere Color/Font or Number are used
in inspectors and/or FIBs)