Bug 174701 [Viewers] ViewerRow should be reused instead of connected to the Item
Currently we create a ViewerRow ver every Item we create this can degrade performance, we should cache the row and reuse it
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ColumnViewer.java
* @since 3.3 <strong>EXPERIMENTAL</strong> This class or interface has been
 *        added as part of a work in progress. This API may change at any given
 *        time. Please do not use this API without consulting with the
 *        Platform/UI team.
 * 
 */
public abstract class ColumnViewer extends StructuredViewer {
	private CellEditor[] cellEditors;
	private ICellModifier cellModifier;
	private String[] columnProperties;
	/**
	 * The cell is a cached viewer cell used for refreshing.
	 */
	private ViewerCell cell = new ViewerCell(null, 0);
	private ColumnViewerEditor viewerEditor;
	/**
	 * Create a new instance of the receiver.
	 */
	public ColumnViewer() {
	}
	protected void hookControl(Control control) {
		super.hookControl(control);
		viewerEditor = createViewerEditor();
		hookEditingSupport(control);
	}
	/**
	 * Hook up the editing support. Subclasses may override.
	 * 
	 * @param control
	 *            the control you want to hook on