Bug 161401 [Viewers] Tweak ColumnViewer-API
- Rename getRowPart(Point point) => getViewerRow() - Rename getCell(Point point) => getViewerCell() - Rename setViewerColumn(final int columnIndex, ViewerColumn viewer) => setupEditingSupport - Make setupEditingSupport() private no one from external needs to use this API to set the EditingSupport for an ViewerColumn
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
if (rowIndex >= 0) {
				return getRowPartFromItem(new TreeItem(tree, style, rowIndex));
			}
			return getRowPartFromItem(new TreeItem(tree, style));
		}
		if (rowIndex >= 0) {
			return getRowPartFromItem(new TreeItem((TreeItem) parent.getItem(),
					SWT.NONE, rowIndex));
		}
		return getRowPartFromItem(new TreeItem((TreeItem) parent.getItem(),
				SWT.NONE));
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.AbstractTreeViewer#internalInitializeTree(org.eclipse.swt.widgets.Control)
	 */
	protected void internalInitializeTree(Control widget) {
		if (contentProviderIsLazy) {
			if (widget instanceof Tree && widget.getData() != null) {
				virtualLazyUpdateChildCount(widget, 0);
				return;
			}
		}
		super.internalInitializeTree(tree);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.AbstractTreeViewer#updatePlus(org.eclipse.swt.widgets.Item,