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
Composite buttons= getButtonBox(parent);
		gd= new MGridData();
		gd.horizontalAlignment= gd.FILL;
		gd.grabExcessHorizontalSpace= false;
		gd.verticalAlignment= gd.FILL;
		gd.grabExcessVerticalSpace= false;
		gd.horizontalSpan= 1;
		buttons.setLayoutData(gd);
		
		return new Control[] { label, list, buttons };
	}
	/*
	 * @see DialogField#getNumberOfControls
	 */	
	public int getNumberOfControls() {
		return 3;	
	}
	/**
	 * Sets the minimal width of the buttons. Must be called after widget creation.
	 */		
	public void setButtonsMinWidth(int minWidth) {
		if (fLastSeparator != null) {
			((MGridData)fLastSeparator.getLayoutData()).widthHint= minWidth;
		}
	}
	
	
	
	
	/**