Bug 160700 [Viewers] Editing backwards compatility
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ColumnViewer.java
if (viewer == null) {
			viewer = createColumnViewer(columnOwner, CellLabelProvider
					.createViewerLabelProvider(getLabelProvider()));
			setViewerColumn(columnIndex, viewer);
		} 
		return viewer;
	}
	/**
	 * Set the ViewerColumn at columnIndex
	 * @param columnIndex
	 * @param viewer
	 */
	public void setViewerColumn(final int columnIndex, ViewerColumn viewer) {
		if (getCellModifier() != null) {
			viewer.setEditingSupport(new EditingSupport() {
				/*
				 * (non-Javadoc)
				 * 
				 * @see org.eclipse.jface.viewers.EditingSupport#canEdit(java.lang.Object)
				 */
				public boolean canEdit(Object element) {
					return getCellModifier().canModify(element,
							(String) getColumnProperties()[columnIndex]);
				}
				/*
				 * (non-Javadoc)
				 * 
				 * @see org.eclipse.jface.viewers.EditingSupport#getCellEditor(java.lang.Object)
				 */
				public CellEditor getCellEditor(Object element) {