Bug 302441 [LinkedResources][CommonNavigator] When to show "Files and Folders Operation" dialog on drop
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/LinkedResourcesPreferencePage.java
gridLayout.marginHeight = 0;
		lineComposite.setLayout(gridLayout);
		lineComposite.setLayoutData(new GridData(
                GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL));
		
		dragAndDropHandlingEditor = new ResourceDragAndDropEditor(lineComposite);
		dragAndDropHandlingEditor.doLoad();
    }
    /**
     * Creates a tab of one horizontal spans.
     *
     * @param parent  the parent in which the tab should be created
     */
    protected static void createSpace(Composite parent) {
        Label vfiller = new Label(parent, SWT.LEFT);
        GridData gridData = new GridData();
        gridData = new GridData();
        gridData.horizontalAlignment = GridData.BEGINNING;
        gridData.grabExcessHorizontalSpace = false;
        gridData.verticalAlignment = GridData.CENTER;
        gridData.grabExcessVerticalSpace = false;
        vfiller.setLayoutData(gridData);
    }
    /**
     * Disposes the path variables group.
     * @see org.eclipse.jface.dialogs.IDialogPage#dispose()
     */
    public void dispose() {
        pathVariablesGroup.dispose();
        super.dispose();