Bug 5677 Hierarchy outline has empty space
I opened a hierarchy view on IActionDelegate. Selected a few of the subinterfaces, changed the expansion state of the tree. Then, no matter which item I selected in the top window (the hierarchy tree), the bottom window (the outline table) always had exactly four empty rows before the first item was listed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/dialogfields/ListDialogField.java
return false;
		}
		return true;
	}
	
	
	
	/*
	 * @see DialogField#doFillIntoGrid
	 */
	public Control[] doFillIntoGrid(Composite parent, int nColumns) {
		assertEnoughColumns(nColumns);
		
		Label label= getLabelControl(parent);
		MGridData gd= gridDataForLabel(1);
		gd.verticalAlignment= gd.BEGINNING;
		label.setLayoutData(gd);
		
		Control list= getListControl(parent);
		gd= new MGridData();
		gd.horizontalAlignment= gd.FILL;
		gd.grabExcessHorizontalSpace= true;
		gd.verticalAlignment= gd.FILL;
		gd.grabExcessVerticalSpace= true;
		gd.grabColumn= 0;
		gd.horizontalSpan= nColumns - 2;
		gd.widthHint= SWTUtil.convertWidthInCharsToPixels(50, list);
		gd.heightHint= SWTUtil.convertHeightInCharsToPixels(6, list);
		list.setLayoutData(gd);