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/TableViewer.java
* 
	 * @param count
	 *            the new table size.
	 * 
	 * @since 3.1
	 */
	public void setItemCount(int count) {
		int oldCount = getTable().getItemCount();
		if (count < oldCount) {
			
			for (int i = count; i < oldCount; i++) {
				TableItem item = getTable().getItem(i);
				if (item.getData() != null) {
					disassociate(item);
				}
			}
		}
		getTable().setItemCount(count);
		if (virtualManager != null) {
			virtualManager.adjustCacheSize(count);
		}
		getTable().redraw();
	}
	/**
	 * Replace the entries starting at index with elements. This method assumes
	 * all of these values are correct and will not call the content provider to
	 * verify. <strong>Note that this method will create a TableItem for all of
	 * the elements provided</strong>.
	 * 
	 * @param element