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/ViewerRow.java
* @param columnIndex
	 * @return {@link String}
	 */
	public abstract String getText(int columnIndex);
	/**
	 * Set the text at the columnIndex
	 * 
	 * @param columnIndex
	 * @param text
	 */
	public abstract void setText(int columnIndex, String text);
	/**
	 * Get the background at the columnIndex,
	 * 
	 * @param columnIndex
	 * @return {@link Color} or <code>null</code>
	 */
	public abstract Color getBackground(int columnIndex);
	/**
	 * Set the background at the columnIndex.
	 * 
	 * @param columnIndex
	 * @param color
	 */
	public abstract void setBackground(int columnIndex, Color color);
	/**
	 * Get the foreground at the columnIndex.
	 * 
	 * @param columnIndex
	 * @return {@link Color} or <code>null</code>