Bug 39746 Move super class constructor combo up.
Move the combo selection for the super class constructors to be above the field treeviewer for the "Create constructor using fields" source action.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/CreateNewConstructorAction.java
public CreateNewConstructorSelectionDialog(Shell parent, ILabelProvider labelProvider, CreateNewConstructorContentProvider contentProvider, CompilationUnitEditor editor, IType type) {
			super(parent, labelProvider, contentProvider, editor, type);
			fContentProvider= contentProvider;
			fType= type;
		}	
		
		protected Composite createSelectionButtons(Composite composite) {
			Composite buttonComposite= super.createSelectionButtons(composite);
			GridLayout layout = new GridLayout();
			buttonComposite.setLayout(layout);						
			createUpDownButtons(buttonComposite);
			
			layout.marginHeight= 0;
			layout.marginWidth= 0;						
			layout.numColumns= 1;
			
			return buttonComposite;
		}
		
		protected void createUpDownButtons(Composite buttonComposite) {
			createButton(buttonComposite, UP_BUTTON, ActionMessages.getString("CreateNewConstructorSelectionDialog.up_button"), false); 	
			createButton(buttonComposite, DOWN_BUTTON, ActionMessages.getString("CreateNewConstructorSelectionDialog.down_button"), false); 				
		}
		
		protected void buttonPressed(int buttonId) {
			super.buttonPressed(buttonId);
			switch(buttonId) {
				case UP_BUTTON: {
					fContentProvider.up(getElementList(), getTreeViewer());