Revision 934693

Chainsaw UI updates (feedback appreciated)
 - instead of the default row selection rendering of changing the row's background color, the selected row color is preserved but a border around the selected row is displayed
 - removed table row and column margin (border around cells in the selected row had gaps without making this change)
 - updated widths of fields in status bar
 - performance tweak: tree node selection no longer triggers unnecessary calculations (only currently displayed rows are recalculated for highlighting)
 - removed bevel border around ID field
 
Fixed xml decoders - an empty throwable node was resulting in a loggingEvent with a non-null (but blank) throwableInformation ('exception exists' expression in Chainsaw would match all events)