this.addSouth(commandPanel,150);
final DockLayoutPanel buttonBar = new DockLayoutPanel(Unit.PX);
buttonBar.addWest(newSceneButton, 100);
buttonBar.addWest(talkButton, 100);
buttonBar.addWest(offButton, 100);
buttonBar.addWest(rollButton, 100);
buttonBar.addWest(deleteButton, 100);
buttonBar.addWest(reindexButton, 100);
this.addSouth(buttonBar, 30);